Amazon Trade-In

Yes i've done it, the process went quite well. I've also used both Best Buy and Toys R Us trade-ins as well. At the moment though I do best buy. In terms of value, gamestop gives you the least, next is Amazon and then best buy / TRU give about the same, within cents of each other. So shop around and see who's going to give you the best deal. The other thing i like about best buy is you can take 30 days to mail it to them after you fill out the form and get your quote. So if i think i can finish the game within 3 weeks, i can fill out the form and get potentially a higher price than waiting until i'm totally finished with the game. Anyway look around, they all work quite well and all pay for you to send them your games.

a few of my clannies have and are happy with it. But they also do not have game stops by them. If you do, I would still use them (see tanks respons). You can stack multiple extra credit deals together (about half the time) and make some good money. I even lurk ebay and garage sale to buy old 360 ps3 games on the cheap just to get the extra percentage for trade in's.

Like LB said, ebay is a great place to buy games but a crappy place to try and sell them.