I'm no zoologist, but I like to think that I know what a bunny looks like when I see one. Those are most definitely ferrets. Interestingly enough, I would never pay as high as forty five dollars for a bunny, but for a ferret, that's a steal. I'll go home with a few ferrets for forty five dollars. I hear they're assholes but at forty five dollars who cares.
That's like when you see something mislabeled at a store for much cheaper, so you take it to the register and hope the cashier doesn't realize the truth. That's much harder to do in a pet store, I'm sure. You'd hope that by the time you got to the cash register someone would realize that you're holding a ferret. "Sir, the ferrets are forty SIX dollars." / "Oh. No way then."