Our local Petsmart has the nicest freshwater fish in the area. I wish they'd change up the stock more often, but they're all well taken care of and the tanks are pristine. As far as making the sale...nope. I've never seen them sell a fish to a customer that didn't have an adequate home, with the exception of one person who claimed to have the tank on order but hadn't received it yet. Better yet, the employees don't know everything about fish, but they're at least as knowledgeable as the specialty store employees. Unless I'm ordering something special, it's where I buy everything aquatic.
Good luck in the new job!