Join Goozex.com and you can trade your games to other people and get points in return. These points can be used on other games and even movies. The only catch is that you may need a credit card/a pay pal account for when you want to trade in points for a game. Getting a game off of Goozex requires a token, a token is $1.00. So in perspective, you're paying $1 for a game plus any points you got from trading in games.
I've been doing this with my games since last summer and I can say that if I traded in my games to Gamestop, I wouldn't have the enough cash to buy the games I also got off a Goozex.
