You can now receive $150 toward an Xbox One console when you trade in a working Xbox 360 250GB or Sony PS3 Slim console at a participating Best Buy store. The actual price of an Xbox One console is $350, so you basically get new Xbox One for just $200. Even Microsoft Store offers similar deal where you can trade in your PS3 or Xbox 360 and receive $100 towards the purchase of an Xbox One.
Take advantage of this deal here from BestBuy.
Check out Microsoft Store deals for Xbox One here.