How much could i get for these at gamestop?

One time I went to Gamestop to trade in a few of my DS games. I bought them for about 90 dollars total. ($30 for each) and received 11 dollars STORE CREDIT! They said they would give me 9 dollars cash money for them if I didn't take the credit. The point is, you are probably only going to get one ninth or one tenth of the value of the games at Gamestop. Considering the original price of your games (I was guessing somewhere around 60 dollars for SC2, CODWAW, AVP, L4D and 50 for Halo 3) you would be lucky to get 30 dollars. Gamestop is a great place for buying games, but if you really want to get a decent amount of money for your games, then I suggest finding a different method of selling them. Ebay works awesome, by the way.