At Best Buy retail stores, trade in an PlayStation 3 Slim console or an Xbox 360 250GB console and receive a $100 gift card and $50 coupon toward an Xbox One. Plus, receive an additional $10 gift card for each wireless Microsoft or Sony controller, up to four. That's the largest trade-in offer we've seen toward an Xbox One. Consoles must be undamaged, able to power on and have an unbroken warranty seal to avail of the offer. Note that this promotion isn't available online.