I'm not a fan of the Petsmart in my area personally, the staff consists of a bunch of squealing teenage girls. I've given up on getting fish from there because they all end up being horribly sick. Also yesterday I purchased an Asain painted bullfrog ((Chubby frog)) from them and noticed when I got it home its eyes looked a bit cloudy then in the morning they had turned completely white, a bit of google searching let me know it was a fungal infection cased by being kept in bad conditions.
Honestly though each store is different, so yours might be better than the one we have here.