How Much Money Can I get if i trade in ten video games and a nintendo ds?

I have ten xbox 360 games, 007 Quantum of Solace, Spiderman 3, Fantastic four rise of the silver surfer,bullet witch, narnia prince caspian,tomb raider underworld,marvel ultimate alliance/forza motorsport,priates of the caribbean 3, tenchu z,the elderly scrolls ovlivion, and a red and black nintendo ds