Its hard to trade games in and expect anything close to what you paid, but there are sometimes you acquire games that you will never play again. If you can get some compensation, I suppose its beneficial. Gamestop is having a trade-in promotion. Its simple. Trade in any two of the games listed after the jump, and its 10 bucks for Mario Kart. Click more for the complete list.

Thanks to Fragloser for the tip!

Baroque
Big Brain Academy: Wii Degree
Bully: Scholarship Edition
Cabela’s Big Game Hunter
Carnival Games
Cars: Mater-National
Cooking Mama: Cook Off
Dragonball Z: Budokai T3
EA Playground
Fire Emblem: Radiant Dawn
Ghost Squad
Legend of Zelda TP
Lego Star Wars: Complete Saga
Madden NFL 2008
MLB 2K8
Mario and Sonic Olympic Games
Mario Party 8
Mario Strikers Charged
MOH Heroes 2
MOH Vanguard
Metriod Prime 3: Corruption
MLP Power Pros
My Sims
Naurto Clash of Ninja Revolution
NBA Live 2008
Need for Speed: Carbon
Need for Speed: Pro Street
No More Heroes
Okami
Pokemon Battle Revolution
Rapala Tournament Fishing
Rayman Raving Rabbids
Rayman Raving Rabbids 2
Resident Evil 4: Wii Edition
Resident Evil Umbrella Chronicles
Sims 2: Castaways
Super Mario Galaxy
Super Paper Mario
Super Smash Bros. Brawl
Tiger Woods PGA Tour 2007
Tiger Woods PGA Tour 2008
Transformers The Game
Wario Ware: Smooth Moves
WWE Smackdown vs Raw 2008