A few items..
Components:
- Various Sound Cards (Gravis Ultrasound rev 3.4 and the PnP rev 1.0, SB Pro, SB Pro 2, SB AWE32 CT3999, SB AWE64 CT4520)
- Various Nvidia Cards (Diamond Edge 3D 2120 (Nvidia NV1), GeForce256 SDR and DDR, Ti500, Ti4600, FX5950 Ultra)
- Various Voodoo Cards (Voodoo II SLI 12MB, Voodoo 3 3000 PCI and AGP, Voodoo 5 5500 AGP)
- Diamond Stealth 24VLB, ATI Mach64 VLB
- ATI Mach64 ISA
- Upgradware Slot-T adapters
- SMC LCS-6641 Floppy/IDE 16-bit ISA Cache Controller
- Shuttle HOT-613 Dual Pentium Pro
Desktop Computers:
- Amiga 500, 2000, 4000/040
- Swan XT Turbo 8088-10MHz
- Dash OPS-1000 486 with built-in 5" Amber CRT
- Iwill ZMAX-DP Dual Opteron Shuttle
- Falcon Northwest Fragbox
- Sony Vaio PCV-MXS20 w/ Minidisk Drive
- 2x Compaq Alpha DS10
Handhelds / Laptops:
- Digital (DEC) HiNote Ultra CT475
- Sony Clie UX50
- Sony Picturebook PCG-C1VPK
- Sony Vaio VGN-UX280P
- Toshiba Libretto 110CT
Monitors:
- Bridgeview VS-10S 10" SVGA CRT
- Commodore "Amiga" 1080 CRT
- Commodore 1084S-D2 CRT
- Commodore 1902A CRT
- Samsung SamTRON SC-431E EGA CRT
Probably missed some stuff. I have too much crap.
But if I had to pick the one that was hardest to find and I rarely if ever see any for sale, it would be the Iwill ZMAX or the Vaio MX. Ironically, both are more modern than I normally collect.