Most of the deals are fantastic.
Nintendo has promoted a GameStop deal to trade in select systems towards the purchase of a Nintendo Switch console.
Been holding off on getting a Nintendo Switch? There’s never been a better time to upgrade! With this GameStop deal, receive up to $275 in store credit when you trade in select systems towards the purchase of a Nintendo Switch console! This offer is available until 9/22.— Nintendo of America (@NintendoAmerica) September 17, 2018
Here's a list of the credit you'll receive toward the purchase of a new Nintendo Switch system (subject to manager approval):
Xbox One X or PS4 Pro - $275.
Xbox One Slim or PS4 - $225.
Xbox One Original - $150.
Wii U, 3DS XL or Vita - $100.
That Xbox One X and PS4 Pro deal is a rip off; with that said, the other deals are fantastic, especially if you have an older model that's not in use due to a recent upgrade.