GameStop tried to sell me an open copy as new

I’ve been seeing this game all over Tik Tok. Worked from home today and decided to go pick up a copy at my local GameStop. Went in and the they tried to sell me an open copy claiming it was new. I said no thanks and started walking out the door lo and behold she had an unopened copy. Maybe I’m in the wrong but how can you sell a game as ‘new’ if it’s been opened??? What if roles were reversed

I’ve been seeing this game all over Tik Tok. Worked from home today and decided to go pick up a copy at my local GameStop. Went in and the they tried to sell me an open copy claiming it was new. I said no thanks and started walking out the door lo and behold she had an unopened copy. Maybe I’m in the wrong but how can you sell a game as ‘new’ if it’s been opened??? What if roles were reversed