At Best Buy, buy one select used game and get a second used game (of equal or lesser value) for 50% off. (The discount will apply automatically in-cart when you add two eligible games.) With free shipping, that's the best discount we've seen from Best Buy on used games in recent months. (We saw buy two, get one free in July.) Sales tax is added where applicable. Best Buy carries used PlayStation 3, Xbox 360, and Nintendo Wii games, among others.