So this "Best Buy" Trade-in system, I give them a game, they give me a giftcard equally to the games credit, the question I have is do I need a reciet to "trade-in" the game? And yes iv'e looked on the internet already.

If they're anything like GameStop, no, as long as the games have been opened.

Is this the same as Gamestop's $9 for a $65 trade?