So, you weren't aware that you cannot return an open game as new. Duh. I'm glad you got that figured out before you turn 10.

Also, in most places you cannot buy an expensive piece of equipment on a trial basis and return it because "you didn't like it" (aka: renting). The 3DS is worth significantly less since you used it. Who should pay for that? Stores are cracking down on this and I can't say I blame them.

A man named Bruce, I was going to get a Nintendo3ds pre owned but then he told me "Don't, the 3ds has Internet stuff" and I told him I wont use it but then he told me again and he said its just 10 dollars more so I got the new and 2 games, then once I realized I didn't like the Nintendo 3DS and went there for a refund (since it was only 5 days later) and then he told me that I cant return a new game, and I was so pissed off, if I knew that I cant return a new 3DS for the full price, I would of gotten the pre-owned which I can return, so I told him if I could speak with the manager and he said I cant when the manager was there, I didn't wanna start a problem so I left...
Every other employee was very nice.

A "normal" person would check a product out before buying it.