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eBay Vintage Computing historical prices database

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First post, by vladstamate

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Hi folks,

First my page is up: digiloguemuseum.com. There I put my collection as well as the YouTube computer history videos.

But, as more interest to this group, I've written a series of scripts (which use the ebaysdk) in Python that allow me to search and categorize vintage computer sold related items on eBay. This way we can have an idea as to what to expect to pay (or ask) for an item. I have them separated by computer systems (Kaypro 2, etc), consoles (Nintendo 64, etc), components (Sound Blaster 2, etc) and software/games (Kings Quest V, etc). The data they produce is integrated on my website here. If you click on an item you will actually see individual sold auctions.

>>>>> eBay Vintage Computing Historical Price Database <<<<<

Notes / Features:

- the average price is weighted based on age. So that more recent sales weigh more.
- it only searches SOLD items, not ended.
- the search is NOT perfect. I am adding more logic and filters to make it better
- the scripts run once ever day or so. The longer this runs the more data we'll get
- supports multiple regions with local prices (UK, US, DE, etc)
- games' prices are separated for sealed vs normal
- graphs for prices over time (and sale volume)for each item in each region

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Where do I need help? I need ideas for more things to search for. Now, I am not interested in searching for "SOYO 536C Beta 2 with black chips" motherboard as that is too specific or niche. But if you have ideas of items that are generally looked for, I can add them (like special Sound Blaster CT code cards). Also I can add more regions if people request those.

TODO:

- more categories/better filtering

Feedback? Please let me know !

Last edited by vladstamate on 2019-03-27, 18:54. Edited 10 times in total.

YouTube channel: https://www.youtube.com/channel/UC7HbC_nq8t1S9l7qGYL0mTA
Collection: http://www.digiloguemuseum.com/index.html
Emulator: https://sites.google.com/site/capex86/
Raytracer: https://sites.google.com/site/opaqueraytracer/

Reply 1 of 62, by meljor

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I am interested in 3dfx. So I check your voodoo3 section of sold cards and I find that 3 of the ads are ''ended'' (not sold?). I also see a voodoo3 PCI in there which is normally a higher price compared to an agp version. I also find one voodoo2! and a voodoo4! PCI in that same list..... voodoo4 pci is much more rare and expensive.

Sorry but that's a LOT of mistakes in just one very short list. It's taking the average price of a voodoo3 to around 100 dollars which is way too high. Some people may ask that but I bet very little got sold for that (unless they are boxed etc.).

Voodoo2 section: The highest price of 180 dollar (jacking the price up a LOT) is for a sli SET, not a single card..... 2nd price is ''ended'' (not sold?). So again, a lot of mistakes in just a very tiny section.

asus tx97-e, 233mmx, voodoo1, s3 virge ,sb16
asus p5a, k6-3+ @ 550mhz, voodoo2 12mb sli, gf2 gts, awe32
asus p3b-f, p3-700, voodoo3 3500TV agp, awe64
asus tusl2-c, p3-S 1,4ghz, voodoo5 5500, live!
asus a7n8x DL, barton cpu, 6800ultra, Voodoo3 pci, audigy1

Reply 2 of 62, by vladstamate

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meljor wrote:

I am interested in 3dfx. So I check your voodoo3 section of sold cards and I find that 3 of the ads are ''ended'' (not sold?). I also see a voodoo3 PCI in there which is normally a higher price compared to an agp version. I also find one voodoo2! and a voodoo4! PCI in that same list..... voodoo4 pci is much more rare and expensive.

Sorry but that's a LOT of mistakes in just one very short list. It's taking the average price of a voodoo3 to around 100 dollars which is way too high. Some people may ask that but I bet very little got sold for that (unless they are boxed etc.).

Agreed. I am adding more filters now, basically what NOT to look for, what to exclude, so that the results are more accurate.

meljor wrote:

Voodoo2 section: The highest price of 180 dollar (jacking the price up a LOT) is for a sli SET, not a single card..... 2nd price is ''ended'' (not sold?). So again, a lot of mistakes in just a very tiny section.

I'll add an "exclude" rule for "set".

However no matter how much I refine, there will always be items in a category which do not belong there. My hope is over time, they will be less impactful to the overall price as most items are correct.

YouTube channel: https://www.youtube.com/channel/UC7HbC_nq8t1S9l7qGYL0mTA
Collection: http://www.digiloguemuseum.com/index.html
Emulator: https://sites.google.com/site/capex86/
Raytracer: https://sites.google.com/site/opaqueraytracer/

Reply 3 of 62, by vladstamate

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Ok, I've changed my scripts to now account for a list of exclude and include keywords associated with each item. Only the Voodoo's have such keywords for now, but I will work to add them to all items. As such what it finds is now correct (for 3DFx).

I've also separated Vood3 PCI and AGP in their own categories.

YouTube channel: https://www.youtube.com/channel/UC7HbC_nq8t1S9l7qGYL0mTA
Collection: http://www.digiloguemuseum.com/index.html
Emulator: https://sites.google.com/site/capex86/
Raytracer: https://sites.google.com/site/opaqueraytracer/

Reply 4 of 62, by sf78

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Great idea, but like mentioned previously, there are severe errors in the listings. For example, the MT-32 gives one listing for a CABLE that is used with it, not the actual device. Same thing for the 387 math co-processor, one of the listings is a whole 386 mainboard which just happen to have a 387 attached. I really like the idea of this website, but it seems to need a lot of hard work to make it work. Also it would be great to have UK/DE eBay listings, because hardware and software prices vary a lot across the pond. Best of luck!

Reply 5 of 62, by vladstamate

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Thank you for spotting those. I've turned the knobs in the logic for Sound canvases. The 387 category looks good though.

The other thing I fixed is I only log at actually SOLD items as opposed to ended. That was intention originally, but my scripts had a bug in using eBay's API.

YouTube channel: https://www.youtube.com/channel/UC7HbC_nq8t1S9l7qGYL0mTA
Collection: http://www.digiloguemuseum.com/index.html
Emulator: https://sites.google.com/site/capex86/
Raytracer: https://sites.google.com/site/opaqueraytracer/

Reply 6 of 62, by konc

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This is a very interesting project, thank you for making it available! Excuse me if I sound dubious, I'm mostly curious and definitely not criticizing (especially at this early stage). I'd really like to see it properly realized but I see major problems to overcome through scripting + ebay's API.

Let me give an example: Will you eventually be able to distinguish between the following listing titles 1) "Nintendo 64 with cartridges", 2) "Nintendo 64 without cartridges", 3) "Nintendo 64 + cable", 4) "Nintendo 64 cartridges", 5) "Nintendo 64 Game Pak", 6) "Nintendo 64 games", 7) "Nintendo 64 cartridge cases"? Only 1,2&3 are consoles, 4,5&6 are cartridges and 7 just cases?
If so, this has a huge potential and will evolve into something really useful for people to use. If not, don't get me wrong, I don't believe it'll eventually contain realistic data.

(Hey, you asked for feedback 🤣 )

Reply 7 of 62, by vladstamate

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konc wrote:

This is a very interesting project, thank you for making it available! Excuse me if I sound dubious, I'm mostly curious and definitely not criticizing (especially at this early stage). I'd really like to see it properly realized but I see major problems to overcome through scripting + ebay's API.

Thank you !

konc wrote:

Let me give an example: Will you eventually be able to distinguish between the following listing titles 1) "Nintendo 64 with cartridges", 2) "Nintendo 64 without cartridges", 3) "Nintendo 64 + cable", 4) "Nintendo 64 cartridges", 5) "Nintendo 64 Game Pak", 6) "Nintendo 64 games", 7) "Nintendo 64 cartridge cases"? Only 1,2&3 are consoles, 4,5&6 are cartridges and 7 just cases?
If so, this has a huge potential and will evolve into something really useful for people to use. If not, don't get me wrong, I don't believe it'll eventually contain realistic data.

(Hey, you asked for feedback 🤣 )

Absolutely. This is a decent size project, hence I need (and am asking for) help.
Yes, that is what I am doing now. I am working on separating "games" vs "consoles" because the titles are confusing sometimes. This should be done today. After that I will separate "consoles" and "consoles+stuff" (where stuff can be games, controller, etc). This will not be perfect but it should help a lot. This is similar how I already separated Voodoo 3 PCI vs AGP (as someone already noted those are different priced/rarity).

The scripts allow me to do that relatively easy.

The hard work now is in noticing particularities about auctions as I can translate those into categories.

Here is an example: I want to have a 486 DX4 100Mhz processor category. But in many cases (most?) those are sold in actual machines and I want to exclude those.

So that is what I am working now.

Negative feedback is good, as it means it points out the issues so I can fix them. 😀)))

YouTube channel: https://www.youtube.com/channel/UC7HbC_nq8t1S9l7qGYL0mTA
Collection: http://www.digiloguemuseum.com/index.html
Emulator: https://sites.google.com/site/capex86/
Raytracer: https://sites.google.com/site/opaqueraytracer/

Reply 8 of 62, by Shagittarius

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The software should also be split into 'SEALED/NIB' and 'OPEN/USED'. Those 2 categories are something that will really affect the price and that someone might also care to differentiate between. If you are just looking for a used copy of the game the average price will be a lot cheaper if you filter out the unopened new copies, but it will be tricky because you can't just used 'NEW' as an indicator a lot of people put open used copies up as new for some reason.

Reply 9 of 62, by vladstamate

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Shagittarius wrote:

The software should also be split into 'SEALED/NIB' and 'OPEN/USED'. Those 2 categories are something that will really affect the price and that someone might also care to differentiate between. If you are just looking for a used copy of the game the average price will be a lot cheaper if you filter out the unopened new copies, but it will be tricky because you can't just used 'NEW' as an indicator a lot of people put open used copies up as new for some reason.

Good point. I've added that to the todo-list. This will also mean 2 entries per game in the table, which is fine.

YouTube channel: https://www.youtube.com/channel/UC7HbC_nq8t1S9l7qGYL0mTA
Collection: http://www.digiloguemuseum.com/index.html
Emulator: https://sites.google.com/site/capex86/
Raytracer: https://sites.google.com/site/opaqueraytracer/

Reply 10 of 62, by vladstamate

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Support for multiple regions added ! Now it displays results from US, UK and Germany. Very easy to add other countries/regions. Let me know if you have any requests. The prices are listed in the local currency.

YouTube channel: https://www.youtube.com/channel/UC7HbC_nq8t1S9l7qGYL0mTA
Collection: http://www.digiloguemuseum.com/index.html
Emulator: https://sites.google.com/site/capex86/
Raytracer: https://sites.google.com/site/opaqueraytracer/

Reply 12 of 62, by konc

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vladstamate wrote:

Yes, that is what I am doing now. I am working on separating "games" vs "consoles" because the titles are confusing sometimes. This should be done today. After that I will separate "consoles" and "consoles+stuff" (where stuff can be games, controller, etc). This will not be perfect but it should help a lot. This is similar how I already separated Voodoo 3 PCI vs AGP (as someone already noted those are different priced/rarity).

This is amazing, it doesn't need to be perfect, it can't be honestly. As long as you can distinguish between "stuff for a thing" and "the thing itself" for most cases it will, given time, collect realistic data! When the largest part of data is correct a few wrong entries won't affect anything.

Reply 13 of 62, by JoeCorrado

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vladstamate wrote:

Hi folks,

First my page is up: digiloguemuseum.com. There I put my collection as well as the YouTube computer history videos.

Always good to add an additional resource to the cause! Great work!!

-- Regards, Joe

Expect out of life, that which you put into it.

Reply 14 of 62, by vladstamate

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UPDATE:

* separated games into normal and sealed (because there can be a significant price difference and also because some people prefer to buy one or the other)
* did a better job to separate consoles from "games for console" so that console prices are much more accurate now

I also found a working Sega Genesis which sold for $0.10 (yes 10 cents!).

YouTube channel: https://www.youtube.com/channel/UC7HbC_nq8t1S9l7qGYL0mTA
Collection: http://www.digiloguemuseum.com/index.html
Emulator: https://sites.google.com/site/capex86/
Raytracer: https://sites.google.com/site/opaqueraytracer/

Reply 15 of 62, by vladstamate

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UPDATE:

* added support for more components, specifically graphics cards: ATI Rage stuff, Radeon 7000, Matrox, early Nvidia and PowerVR cards.
* added more games: Might And Magic series and some of the Gold Box series.

YouTube channel: https://www.youtube.com/channel/UC7HbC_nq8t1S9l7qGYL0mTA
Collection: http://www.digiloguemuseum.com/index.html
Emulator: https://sites.google.com/site/capex86/
Raytracer: https://sites.google.com/site/opaqueraytracer/

Reply 16 of 62, by SpectriaForce

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From my experience I can tell that sold prices also depend on the shipping destinations. Sellers who only offer national shipping will likely get less and sellers who offer international shipping can usually sell items for more than average.

Reply 17 of 62, by vladstamate

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It is quite possible. However those are flavors that I cannot possibly (and likely will not) deal with. And I doubt they really impact the big picture which is really what I am after.

And in the big picture it might not matter. In fact I ignore the entire shipping destinations and costs issues. Because it varies too much and depends on the buyer.

Basically I want to answer questions like this:

"Hey how much will Indy and Fate of Atlantis SEALED cost me? Am I talking 30 bucks or 300 bucks?"
"How much did Voodoo 2 prices change over the last 2 years? Are they going up or down?"
"If I want to buy the entire SSI Gold Box collection, what am I looking at spending?"
etc...

YouTube channel: https://www.youtube.com/channel/UC7HbC_nq8t1S9l7qGYL0mTA
Collection: http://www.digiloguemuseum.com/index.html
Emulator: https://sites.google.com/site/capex86/
Raytracer: https://sites.google.com/site/opaqueraytracer/

Reply 18 of 62, by blurks

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That is an interesting project but the focus on early 80's/8-bit hardware isn't really my cup of tea. If you could include a little bit more variation (like some PS/2 models or some 386/486 systems from Compaq, HP, Gateway) it would be much more helpful.

Reply 19 of 62, by Shagittarius

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Another issue with the games unfortunately would be harder to solve, Example look at KQVI sealed. The second item is of a sealed jewel case not the CIB/SEALED edition that someone would probably be looking for it they were concerned with a product being sealed. Like I said people describe things all sorts of crazy ways. Ebay would be a really good place for an AI to comb through peoples listings and correct them based on the images.

Also all of your Might and Magic 6 results are not for Might and Magic 6, they are people saying 6 discs with the Might and Magic game/collection. There are going to be a lot of barriers for this to be reliable.