Just thought I'd share the link to a cool site I found with lots of 8-Bit and 16-Bit games and software for sale. I've delt with the owner before and he's very trustworthy (he gets the Tempest seal of approval). I'm just amazed at some of the stuff he gets in, for instance I was able to get a few complete Infocom titles (ok so I'm in IF geek, so shoot me) that I had been looking for for a long time. If you looking for hard to find 8-bit or 16-bit stuff, you might want to check Bravo Sierra out.

http://www.aracnet.com/~atari/catalogs.htm

Tempest