How much money would I get for this games?

I'm going to sell this games at Gamestop and I want to know how much money I might get. The games are the following:



-Destroy all Humans



-Shadow the Hedgehog



-Marvel Ultimate Alience



-Bully



-Superman Returns



-Tomb Raider: Legend



So can you guys tell me how much I'd get for this games?



P.S. Please don't tell me to sell them on Craiglist or eBay. I don't have a credit card so those sites are out of the question.How much money would I get for this games?
call gamestop after 10 am and they will tell you. also check best buy trade ins thingy