Couldn't edit my old thread. Some things I'm (still) looking for....(marked some of the more important things in bold but if you have any for sale/trade let me know).

1MB ISA VGA card
384mb of 66mhz SDRAM (either 256+128 or 128x3)
3DO/CD-i/Saturn controllers (good condition)
64 Magazine Issue 40
Acorn Archimedes A3020
CD-ROM drive(s) - anything faster than 4x. Must be beige though.
Commodore 64 Disk Drive
Creative CT2230, 2290 or CT2830 ISA sound card
Mega Drive Mouse
NTSC NES (console only)
Razer Boomslang 2100 mouse
Silver Gamecube controller
SNES mini (console only)
Voodoo 3 3000 AGP

Games:

Blood Omen: Legacy of Kain (PC) - big box
Legacy of Kain: Soul Reaver (PC) - big box
The Legend of Zelda: The Minish Cap (GBA) - cartridge only
Wario Land 4 (GBA) - cartridge only