Only works in you already have a One preordered.
Sunday, GameStop is offering a trade-in event if consumers use the credit toward a preordered Xbox One; the new has created an Internet buzz Sunday morning. All GameStop stores are offering a 90% hardware and software trade-in credit that can only be applied towards a preordered Xbox One sale. This offer is only good on Sunday, Nov. 17, 2013, according to GameSpot.