Is buying games and immediately selling back something that frown upon by employees? Is it it a trade they will reject (I assume they have the discretion to reject any trade they want). My GCU ended so am giving the GameStop/ trading method so am new to this. I have 4 games towards the six game credit bump, and I was thinking of just buying (using already existing credit) two copies of fifa 18 and trading back in order to reach the 6 game threshold.
Just buy the two copies of FIFA at one store and then take the whole trade to another store down the road. You run the risk of getting flagged and trade banned if you do it directly all at once store.