Boy, I sure do love having some rude twat try to push a Nintendo 3DS bundle preorder on me while I'm just trying to look for a used copy of Tekken Tag Tournament 2
Or coming to pick up my preorder and them not having the fucking preorder DLC codes I bought the game from their shitty store for in the first place AND being dicks about it when asked
It's pretty much guaranteed that no adults ever trade in games of their own. Any adult who games can buy their own games. It's exclusively a practice to squeeze money out of children.
That's not true, it's also there so people who sell drugs can accept video games as payment.
I bought plenty of used Xbox 360 games to save money while being over 18
Then I discovered you could get games for cheap ~6 months after release from online retailers so you didn't have to put up with GameStop
Of course, these days it's all Steam and GoG
There's also the high seas. Although, if I like a game I generally end up buying it and if I don't I just delete it.