Hate to tell you this, but throwing out dozens of XT's, 286's and early 386's. Some reparable some full functional. It was at a time when the stuff wasn't vintage it was just old. Back then my vintage PC hobby wasn't vintage, it was just trying to build something that could run windows 3.1.
In particular, throwing out a broken PS/2 model 80 and model 95. I stored the 4MB memory "SIMMS" from the 80 only to sell them later! Dumb Dumb Dumb. The model 95 I broke trying to upgrade from a SX25 to a DX66. Didn't know i could have got a new processor card. Hey it was before I had internet. Only took 10+ years to obtain the two systems again. Lesson learned.
Also my first PC, a Tandon XT, neglected and thrown away when "new stuff" was more interesting. Then i acquired a Tandon 286, Don't know where that went. Then a Tandon 386, lost that one in a big clear out. I had all three, at different times, never side by side.
Biggest regret, not buying an entire network of approx 25+ IBM PS/2's, with model M keyboards, Token ring stuff, etc. <Sigh> Also came free with a mountain of various computers. I scavenged what I could from the mountain, and bought the fated PS/2 Model 80 and 95. The mountain filled the room halfway up and was a big room approx 30x30 foot. There was all manner of stuff there terminals, systems, monitors, weird "ooh whats that" boxes. I barely made a dent into it. One day I went back for more and the whole place had burnt down. I would guess if you put the lot on eBay today you could give up work for 5 years.
Similar thing happened with vintage 50s to 70s TV's. When i got there, two container loads had already gone for scrap. Just some old vintage parts remained, I picked up a valve, and a guy said "did you want those?", yes, "oh we threw out crates of those". must have been 200+ TV's there.
Countless AT cases, who'd have thought they'd be hard to find? Its got to the point of almost considering shipping cases halfway across the world.