I only sold a few stuff from my collection a little over a year ago when I was moving, but it didn't end up being that much of a hassle.
A lot of people are recommending Facebook... but I've heard of way too many scam stories and/or bots on there, so I still refuse to try it. On the other hand, I did have pretty decent experience with Craigslist and Ebay.
Craigslist can be quicker once you find someone interested in an item or set of items... but otherwise can be a bit slow due to being local only (so it will depend on the demand for this stuff in your area.
Ebay, on the other hand, is excellent for getting to a larger audience. And no, you wouldn't have to separate every individual item to list it. You could actually just as easily deal in bulk. For example, separate all PCI-E video cards and sell together as one large lot. To sell quicker, start the auction at $0.99 with no reserve, and the shipping to whatever Ebay calculates it as (usually based on the size of the shipping box.) To avoid dealing with returns, make sure to set the condition as "For Parts or Repair". Of course, if anything (or even the majority) from that lot works, do write that in your item title and description. Just write that you don't want returns because you are trying to clear this stuff. This is how I sold the few items I had time for in my collection, and not only did I get a decent amount of $ (which I didn't honestly care too much for, I just wanted the stuff to find a better home and/or some use), but all of the buyers were satisfied too. And the prices of my stuff was actually more fair this way, as I let the bidding determine the price instead of pricing something too high and waiting for months for someone "to bite". Like I said, I didn't care about how much I was going to make (or if anything at all.) But I had some old and obscure stuff that was getting hard to find but that I didn't have any use for myself. So I'm glad I was able to pass them down onto other people.
The only bothersome part with selling your stuff on Ebay, I suppose, would be the shipping part. Actually, the shipping part is easy. It's the packing that can get a little more tiresome. In my case, I was lucky that I lived in a fairly dense suburban area, so all I had to do was walk down the street in my neighborhood on the night/day before trash/recycling services came, and pick up empty boxes and packaging materials so that I wouldn't have to drive to my UPS or USPS or FedEx store, wait in line, and pay extra (sometimes too much) for packaging supplies that would only get used once anyways. The only packaging supplies I did buy was a large roll of masking tape (works better for cardboard boxes IMO) and clear mailing/packaging tape (for taping shipping labels onto the box.) That's it.
Of course, if you don't want to deal with shipping at all, you can list some or all of your items as local pickup only. That of course would probably limit the number of buyers/bidders quite a bit. But at least you would still get the wide Ebay audience. Just make sure that if you do "local pickup only", you write that in several places in your auction/ad, to make sure people see it. Dealing with people who bid blindly without noticing you have the auction set as "local pickup only" can be both frustrating for you and for them.
Anyways, at least that's how I'd tackle this.
You could also try posting your stuff on other computer & electronics forums that allow these kinds of posts (VOGONS is not one of them, unfortunately.)
(Or now that you've created this post, wait for PMs to pour in? 🤣 )
