New consoles ( xl ) are shipping with 11.0 , older stock of the small N3DS are still shipping with 10.7 ( Target exclusive Mario Land )
Gamestop not taking returns, they might be on to the whole, it's probably bricked due to you trying to mod it scam. They caught on to this during the Xbox 360 ban waves years ago and quit taking in trade ins and returns.
I'll be picking one up from gamestop in about 5 hours, so I'll verify if it's on 11.0. I already have an o3ds with A9LH with fieldrunners prepped, and because I am going to sell the o3ds after I move over to n3ds I don't have to worry about getting nnid back.
At least it's standard price. Knowing Nintendo's past sometimes they get priced higher with specialty designs. They already are online due to scalpers, luckily they are standard price at my local gamestop.