Speaking in terms of my collection, I'm looking to reunite with a few old friends, and possibly make some new ones. ^_^
Sega Master System ($30-40, I'll pay less for a Genesis or Game Gear converter)
TurboGrafx-16 ($35-50, must come with a really good game like Ninja Spirit or Bonk's Revenge)
Neo Geo Pocket Color ($30-40)
3DO ($25-30)
Virtual Boy ($35-45)
I also have a lot of LCD handhelds (see my other post) and even a Pac-Man arcade marquee if anyone wants it...