360 launch titles and Gamestop Used Games

I have a major split in my xbox 360 catalog. I have the old games, and newer games. But nothing in between. By old I mean, some of them are launch titles, and older games that few people were interested in, but appealed to me. By newer, I mean recent games. I am looking to get rid of the older games, and get some more 360 games.

What would be my best option, what does Gamestop offer for 360 launch titles, or esoteric titles that no one cared about. Should I go to amazon, how does that work. How would I ship them, I do not know.

GameStop will give cents maybe even 2 bucks for each launch title.

They might not even take launch titels.

I wouldn't recommend amazon.

To big of a hassle, and you might break even on the shipping costs.

Try Craig's list, but GameStop seems like your only option