You're in the wrong country. Come to Aus. Game values here don't drop for classics that are hard to find. Which mans mainly Nintendo console games lol.
i.e Starcraft 64 or Snowboard Kids2 boxed manual in mint = approx $1k, sometimes more if one hasn't appeared on eBay for a while
Also some of the good games on PS1/PS2 and Dreamcast etc.. not too sure about the other systems as I got all th games I want from them so don't keep track.