Well, there appear to be stains on the case velvet. So I would assume it is used/second hand. If you picked it up cheap and it works; then who cares. If you paid some coin for it, then it is a little late to be worrying about that now. If you didn't trust your source, why did you buy it?

Unless you are trying to make a nice sized profit quickly; in which case I say "If you can't tell if it is legit, then you shouldn't be trying to flip it".