Not exactly sure whether you'd call these unusual but here goes:

-Original HP Vectra (PC Semi-compatible from 1985)

-An e-Reader for my Gameboy advance (the card reader where you could tediously read a tiny program by scanning around 10 barcodes)

-A still-functional (AFAIK) Game Genie for my original Gameboy

-A still-functional (AFAIK) Game Genie for my (broken) NES.

-All sorts of other peripherals for that old NES including a power pad.