Off the top of my head I have...
Vic 20
C16
C64
Amiga 500
Amiga 600
Amiga 1200
Plus 4
Oric Atmos
Oric 1
Elan Enterprise
Texas TI-99/4a (2 off)
Sinclair QL
ZX81
ZX Spectrum
ZX Spectrum +2
Sord M5
Toshiba MSX
BBC Model B (No EPROMS no holes, perfect)
BBC Model A
Acorn Electron
Arcamedies 3000
Dragon 32
Dargon 64
Atari 400
Atari 1200XL
Atari ST
Camputers Lynx
Tatung Einstein
Tandy Colour
Amstrad CPC464 (Think, I am not at home as I type this list)
Ive missed a few off that I can't remember without opening the cupboard of computers

I focus on the old home computers from the UK sector rather than PC's or pre-pc tech that was more office focused. I NEED to get the following
Jupiter Ace
ZX80
MSX 2's of some form
Many others but I had a spat about 5 years back when I simply went OTT on eBay and outbid the WORLD on kit, even ended driving to some students pad in Oxford who had a room full he'd been collected and bought all his best kit! Paid silly money for some, but they are mostly mint boxed examples so hopefully will pay me back one day