So what do you do with your old games (or any game, I guess) once you've decided not to keep them in your collection? Do you sell it off, trade it in, or just keep it anyway?

I've sold maybe one or two in stuff like yard sales, but most often I just hit up my local Game Exchange and just trade it in for in-store credit, and then pray that I find something I can use the credit for. I've tried getting just cash for my trade-ins, but then realize that I'm more than likely going to spend that money on games anyway.

So what about you all?