http://www.sayswap.com/
This is a site i found that i trade my video games(Xbox,PS2,Cube,PS3, 360,DS,Gameboy advanced,Wii,PSP) that I don't play or want anymore for points than i buy trading tokens and trade for games i want.There is also free shipping within the US(printable envelope). The only compliant i have about the site is when you receive a game all you get is its game, instruction booklet, and its outside sleeve, BUT you can go down to your local hollywood video and ask for the case, they always give me one, but anyway its a good way to get rid of games that you don't play and get ones you want or have an interest in.
