Hmm, you could make up some "Grab Bags" so to speak and fill em with odds and ends that might be handy...
Have you run into any old Apple or Atari stuff? I have been taking an intrest lately in "Antiques" that were around when I was a child in the 80's, kind of a cheap hobby since most of the stuff people would just throw away what they think of as "Junk"
There are tons of common items on EBAY from the 70-90's that can be had dirt cheap, like the SLI Voodoo2 cards I picked up for 25$.
Some rare items can bring a few hundred to a few thousand, like a signed Apple or the ultra rare Voodoo 5 6000 that people tend to bid crazy on when they show up for auction
I would also like to get ahold of an old Radio Shack "Trash 80" (TRS-80) like Ferris Bueler had in War Games (It want the voice module too!)