How much would I get to trade in these games?

I have Mass Effect and Forza Motorsport 3 for the xbox 360, how much would I get to trade in these games somewhere like game or gamestation?How much would I get to trade in these games?
6 pound cash 8 pound trade each gameHow much would I get to trade in these games?
maybe 20 buck for both on gamestop idk about gamestaton. but if u want to trade your games to gamestop you can get a 30 percent trade in credit on some these pre-order games here is the website http://www.gamestop.com/gs/specialty/tra鈥?/a>How much would I get to trade in these games?
Not much at all, put them on eBay. You get a lot more