If you are looking for the best prices to sell your games: Ebay. If you are looking to be ripped off, sell for pennies on the dollar? Gamestop. The majority of the time, you can find better deals at Walmart. $2 off full retail is not a deal. Selling your Nintendo DS for $19 to them to have them resell it at $130? Not a deal. Several times I purchased used games, to not be allowed to inspect them until I've made payment, to have the receipt in my hand - open the case - and observed the disc damaged and had to demand immediate refund. They are worse than a pawn shop.