horrible attitude

I just went jn to the store to ask how do they determine the pre owned games price and then the guy told me that he just puts it on their system and then they price it and that the amount of times the game has been used doesnt matter. so i told him that they shouldnt put stickers on the games about the amount of times the games have been used if it doesnt matter. he then got an attitude. Started calling me dude. So i just turned around and left. This guy doesnt belong in a store and i will never return to brooklyn bt games as long as he works there