Puh, I did this a while ago, let me see if I can come up with one for JUST my Pentium Pro 200mhz in 1996

I know the Voodoo 1 4MB boards were 300 bucks at launch
The CPU I would wager was around 700-900 USD in 1996, maybe more. Will go for 800 here.
The motherboard I would guess, it being an OEM board, was about 100ish bucks. Perhaps 200. Will go for 150 here.
128MB of RAM in 1996 I find is 180 USD per 16MB (550 for 232MB stick which is what is in there), so I will go for 400$ per 32mb stick as it's close making it 1600$ for 128MB
A 147GB 15k SCSI hard drive would probably not have existed in 1996. I'm going to say a conservative price of 1000$ for a similar storage solution of a similar size, although this is just a guess.
I would add 300$ ass a guesstimate for the controller too.
An ATI Mach64GX in 1996 I would wager to be around 200$.
The case would probably be 75$ even though it's a cheapish one.
An SB CT:3670 at launch I would wager to be ~120$.
DVD drives probably didn't exist, but a similar CD system would likely be perhaps 80ish bucks?
I'd say a 36.6 modem might be around 50 bucks?

This is a STRONG guesstimate. To add this all up I get
4375 USD in mid 1996. In 2017 dollars this is 6900USD approx by my calculations.

To build I paid around 300 USD in total.

There is room for error. As with many of my systems, I have stuff in them that wasn't easily obtainable for the time, but isn't technically impossible to have then, maybe besides a DVD rewriter.

IBM PC - Dual 5.25" Floppy, CGA graphics, 5153 CGA monitor, Microsoft Mouse, Epson fx-86e printer, DOS. Was around... $4500 in 1984? So $10,893 in 2017.

The "car or computer?" question was real back then.

CkRtech wrote:

IBM PC - Dual 5.25" Floppy, CGA graphics, 5153 CGA monitor, Microsoft Mouse, Epson fx-86e printer, DOS. Was around... $4500 in 1984? So $10,893 in 2017.

The "car or computer?" question was real back then.

A car would sadly last you longer.

My current Pentium 233MMX Build
ATX motherboard - probably about $100 when new.
Pentium 233MMX - $594
Voodoo 3 2000 PCI - $249
Sound Blaster AWE 64 Gold! CT4390 with 24MB Creative upgrade board. $199 for the AWE64 and ??? for the upgrade - anybody know how much these were when new? I'll say $200 for now.
Yamaha SW60XG - can't find the new price. I'll say about $200 which is what I am guessing due to how much the db50xg was new.
STB Ultrasound 32 Pro (OEM - Compaq- Gravis Ultrasound PnP) - I'll say about $200
Aopen AW744L II (Yamaha YMF-744) probably about $30 new
PCI Sata controller - probably about $30 new
128GB SSD - About $150 when it was new.. but for something this size and speed back then... hahahahahahaha
256MB PC-100 - about $3 per MB back then so $768
Case .. $50-ish
Power supply.. $50-ish
floppy drive - $20
CD-ROM - $60

So... not including the absurd price for that amount of storage back then.
$2,550 (Going with a build year of 1997 so $3,889 in 2017 dollars)

What I paid...
MB - about $10
233MMX - $8
V3-2000 PCI I'll say about $5 - came in a lot with other cards
AWE64 Gold! - free from a curb-shopped computer
Creative RAM upgrade card (came with an AWE64 Value) and SW60XG - $150
Gravis Pnp - $75
Aopen AW744L II - free
PCI SATA controller - $7
128GB SSD - free
256MB PC-100 - free
Case - free
PSU - $18
floppy - free
CD-ROM - free

Total: $273

Here's what I could gather regarding my Celeron 433 build.

Prices when new in 1999:
CPU: Intel Celeron 433MHz - $169
Mobo: ASUS P2B - $100
RAM: 192MB PC-100 SDRAM - $299
HDD: Maxtor 13GB IDE - $275?
CD1: Sony 8x DVD-ROM - $200? (Is actually a 2004 model)
CD2: Teac 24x CD-RW - $150? (Is actually a 2001 model)
Floppy: 3.5" 1.44MB - $30
AGP: ATI Rage Pro Turbo 8MB - $98
PCI - 3D: Diamond Monster 3D II 8MB Voodoo2 - $249
PCI - NIC: Startech OEM Realtek RTL8139 - $60?
ISA - Sound: Sound Blaster AWE64 Value - $80
Case: Red Standard ATX Case - $60?
PSU: 200W ATX - $90?
OS (what probably would've been used on such a machine BITD): Windows 98 - $100

Total: $1,969

What was actually spent in 2013-onwards:
CPU: Intel Celeron 433MHz - Free (pulled from a dead Gateway PC)
Mobo: ASUS P2B - around $50 (eBay), I can't remember the exact price I spent so this is a rough guess.
RAM: 192MB PC-100 SDRAM - Free (pulled from other PCs)
HDD: Maxtor 13GB IDE - Free (pulled from an iMac that got upgraded)
CD1: Sony 8x DVD-ROM - $10 (eBay)
CD2: Teac 24x CD-RW - $2 (bought at a thrift store)
Floppy: 3.5" 1.44MB - $8 (eBay)
AGP: ATI Rage Pro Turbo 8MB - Free (built into the motherboard)
PCI - 3D: Diamond Monster 3D II 8MB Voodoo2 - $65 (eBay)
PCI - NIC: Startech OEM Realtek RTL8139 - $15 (eBay)
ISA - Sound: Sound Blaster AWE64 Value - $15 (eBay)
Case: Red Standard ATX Case - $15 (bought at a local recycling center)
PSU: 200W ATX - Free (pulled from an old Dell tower that fell apart)
OS (what it's currently running): Windows 95 OSR2.5 - Free (Internet)

What I spent on initial build in 2014 (removed the Voodoo and NIC): $85
Total I spent so far: $165

Please excuse me if you spot any errors/left-out details on this post, I just finished writing this post early in the morning before I went to bed so it's possible that there's something I may be missing.

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BTW, Does anyone know where I can find detailed period-accurate price rates for older PC hardware? I've done the usual google search on each individual component and so far the only accurate prices I could find were for the CPU and GPUs, everything else in the 1999 list were rough guesses mainly based on the original post, also, I would like to find out hardware prices for 2004/05 so I can post the pricing info on my XP rig.