Sigh you guys not reading right. I bought games that cost me $130 total. I took those games to gamestop and traded them in which net me $300 in gamestop store credit. Then I used that credit to get a switch.
To make it simpler:
I bought a 5 dollar game, then traded that 5 dollar game to gamestop for 15 gamestop credit.
It's all about knowing the trade values, and knowing where to get those games cheap.