Didn't Tom's Heroes (www.tomheroes.com) have an online price guide for handheld games a few years ago? I know someone was tracking ebay prices and made a price guide. I found this article that mentions the Adventurevision I sold on ebay in '99 and it reminded me of his price guide. Did it go away or was it someone else who had it?
http://www.tomheroes.com/Video%20Gam...trotimes25.htm
y-bot