Of course you won’t be getting a 1-for-1 trade-in. Gamers who trade-in consoles like the PS4 or Xbox One will get up to $200 and $150 in trade credit respectively, while gamers who bring in consoles like the Wii U or the Nintendo 3DS handheld console will only get up to $100. We say “up to” because depending on the condition of your console, there is a chance you might not get all of it.
However if you were already planning on buying the Xbox One S anyway, we suppose saving yourself the odd $100 isn’t such a bad idea. Given that the 500GB Xbox One S starts at $300, if you can knock $100-$200 off, it’s actually a pretty decent deal.
It also appears to be usable towards bundles like the Madden NFL bundle, the 500GB Halo bundle, and the Gears of War 4 bundle. The Xbox One S has been scheduled for a release in August, and the deal with GameStop seems to be only valid for 1 day which is the 30th of July, so you’ll want to hurry if you want to get in on it.