How much is it to swap games swap tree?

You can swap your games at below website

At most Gamestops, you can exchange a game you purchased within the last seven days to get your money back or to pick a game of equal or lesser value. You can also exchange a game within the seven...

If by swap players you mean replace player one with player two and vice versa, that is both impossible and unnecessary.

depends on retail value and demand for the game you want to trade. you'll never get full price because the store still needs to make a profit from it. if the store sells it for $10 then you might get...

If the game is a old game.