The EB games I go to seems to have a much better used games selection. I found Mega Man Anniversary Collection there not to long ago.
Gamestop IMO are notorious for trying to get you to preorder a game; you could ask about the next Barbie for Wii game and they will tell you that there are tons of preorders and that you better preorder to if you expect to buy a copy. Bunch of LIARS!!!







