orcishgamer: PC folks always forget the value of passing around games you are done with. Yes, we do it a lot.
Pheace: Although that thought hadn't come up either I was really just feeling it was a low percentage sale. You could still pass them on even if you got them cheaper, but I'm guessing then that doesn't happen often with console games?
We pass any games along. It saves money, even among my buddies who have decent paying salaries. They do buy new games too, it's just a better way of "trying it out" or "renting".
There's also online swapmeet sites that let you execute trades for a dollar apiece. They even generate a printable shipping label for you. Not all used game sales are at Gamestop, though the majority of kids do do their trading there.