I'm not sure if I'm a collector or just a hoarder. I know which one my wife believes I am. All I know is every time I do a cull I end up regretting it sooner or later.
A few items off the top of my head:
C16 C64 breadbox C128D 1804s monitor about 6 * 1541s Couple of Amiga 500s Various old PCs Atari 2600 2*MPS801 Couple of plotters Atari Jaguar Several Atari Lynx Quite a few Nintendos from various generations - Portable and consoles