First item which comes to mind is my Atari 2600, it's ship shape and I have a lot of games for it I don't necessarily remember.
I have 3 of my own that rarely get used (yet surprisingly the Jr. is nearly my only piece of old hardware my wife doesn't want me to get rid of) so I am not interested in acquiring it, but what model is it?
As mentioned in the other thread, I have a few enhanced apple IIes I might trade for the right offer. I keep them all for spare parts for the ones I use, and to protect them. They came from a school, so they have marker and engraving on them. They have yellowing on the cases. most keyboards are missing keys, but this can be fixed if needed. No monitors or cables, but they can be connected to a tv, and use a standard power cable. No drives are available at this time. There are a variety of cards, mostly Super Serial, floppy drive, and mouse controller cards I believe.
I have a handful of common cartridges for most Nintendo consoles, as well as a couple for Sega consoles. Maybe some controllers, too.
Things I am interested in:
Portable computers/devices
Extreme Green N64 controller
Nintendo Stuff
Apple II stuff
Dreamcast stuff
Good Keyboard
Commodore 64
Interesting old mechanical and electronic stuff
weird stuff