Roland SCC-1 for ~$200 on eBay a couple of years ago. I hesitated, hit refresh, and it was gone 🙁

Many.
The TOP3 are probably:

Roland Sound Canvas sc-55
2 or 3 years ago a couple of months apart two of them turned up on a local trading site for around $100. I was about to buy my apartment.

S3 Savage 2000
I procrastinated and it's got sold.

A bunch of older physical games. They were cheap and abundant, then they all disappeared like they never existed. Last time was a copy of Aliens vs. Predator 2 last week for $5. I forgot about the auction.

This is the first 3 things that comes to my mind.

RandomStranger wrote on 2022-02-16, 17:48:

A bunch of older physical games. They were cheap and abundant, then they all disappeared like they never existed. Last time was a copy of Aliens vs. Predator 2 last week for $5. I forgot about the auction.

AvP2 luckily isn't quite as unobtanium as one might think, they do pop up from time to time even as big boxes. I got mine couple years ago for 10€.

But yeah, I've been collecting physical games for some time now and some on my list are really hard to come by and/or are expensive as hell. Brexit didn't help with that, postage fees from UK got pretty obnoxious and UK was my primary source.

Since joining vogons 3 bits of hardware showed up on ebay in large quantities at a good price. Even at the time I knew I should grab one of a few but talked myself out of it each time
NEC XR385 Daughterboards
Aural Vortex 2 soundcard
P3 1Ghz Slot 1 CPU w/ 100FSB

chinny22 wrote on 2022-02-17, 08:57:

Since joining vogons 3 bits of hardware showed up on ebay in large quantities at a good price. Even at the time I knew I should […]
Show full quote

Since joining vogons 3 bits of hardware showed up on ebay in large quantities at a good price. Even at the time I knew I should grab one of a few but talked myself out of it each time
NEC XR385 Daughterboards
Aural Vortex 2 soundcard
P3 1Ghz Slot 1 CPU w/ 100FSB

I regret not buying a ESS Solo-1 with both Wavetable header and SBlink on the card for 10 USD, I blinked and it was gone.

Is there something special about the 100FSB Slot 1 P3s?

TrashPanda wrote on 2022-02-17, 09:07:

Is there something special about the 100FSB Slot 1 P3s?

1Ghz CPU's (and maybe or or 2 below) demand a premium being the fastest of the 100FSB unless you want ot mess round with slocket adapters
600Mhz Katmai also sell for a bit more been the fastest some motherboards take
Something like a 500Mhz on the other hand you can't give away.

chinny22 wrote on 2022-02-17, 09:35:

1Ghz CPU's (and maybe or or 2 below) demand a premium being the fastest of the 100FSB unless you want ot mess round with slocket […]
Show full quote

TrashPanda wrote on 2022-02-17, 09:07:

Is there something special about the 100FSB Slot 1 P3s?

1Ghz CPU's (and maybe or or 2 below) demand a premium being the fastest of the 100FSB unless you want ot mess round with slocket adapters
600Mhz Katmai also sell for a bit more been the fastest some motherboards take
Something like a 500Mhz on the other hand you can't give away.

so what you are telling me is to grab any 100FSB 1ghz P3 Slot 1 cpus I run across if they are a good price.

I had the chance to buy a Roland MPU-IPC-T breakout box locally for $15 last year. I passed on it, as the chances of the required ISA card appearing were zero. A few months later, the card popped up on ebay for $50. Then I had to get the breakout box from Canada, paying around $120 to get it here. In the current market, it wasn't a terrible spend overall. But I was kicking myself.

chinny22 wrote on 2022-02-17, 09:35:

1Ghz CPU's (and maybe or or 2 below) demand a premium being the fastest of the 100FSB unless you want ot mess round with slocket […]
Show full quote

TrashPanda wrote on 2022-02-17, 09:07:

Is there something special about the 100FSB Slot 1 P3s?

1Ghz CPU's (and maybe or or 2 below) demand a premium being the fastest of the 100FSB unless you want ot mess round with slocket adapters
600Mhz Katmai also sell for a bit more been the fastest some motherboards take
Something like a 500Mhz on the other hand you can't give away.

I found a Slot 1 P3 1ghz 100FSB ...then I found the price and nearly died

Even if it is NOS in a sealed shrink wrapped box .. its not worth $700 AUD

Neon250 😜

I missed a TV tuner for Thinkpad 755 series laptops several years ago. BIN for just USD 40. Cannot forgive myself for not buying it. Never seen one since.

An Isa mpu401 card that showed up in local classifieds about a year ago, it was £25 but a lot 30 mile drive and I couldn't be bothered.

There was a "scrap" lot of CPUs a couple years ago for $100 on eBay. Had a Cyrix 5x86-133 in the lot as well as some other Cyrix CPUs.

Was thinking about getting the lot but waited just a bit too long and it was gone....

Oh yeah, another seller on eBay had two AudioTrix Pro sound cards. One with the daughter boards and one without. I bought the one without and then kicked myself later for not spending the extra ~$50 US to get the one with the daughter boards.