Gamestop are jerks.

[MaxwellGT2000]

Wow I didn't know I was a jerk >_> anyway it's all business, it's the same thing any store does with used games, many used copies of whatever game you find on Ebay is a guy with his own game store found it and bought it for half the price he's selling it for. Every middle man does it if you don't like the price you get there, do more work yourself and sell it on Ebay or to a friend, if you want convenience go to a store like GameStop, if you want the most money sell it yourself.