How to rip off EB Games/GameStop.
Buy 3 games for $50 take them to retail store that offers 3 games traded in for a new game. Take the new game and trade it in at EB Games and get $77 with your Edge card which gives extra 10% of trade in value. Repeat process over and over. Make lots of store credit. $27 profit made every time in store credit.
You can more or less do this anywhere in the world works for PS3, 360 and Wii games.