I'm not sure why you want to buy from a pet store this time?

You ask about mites, but those are far from the only problem you can bring home from a pet store. In fact, from what I've read (I haven't experienced it myself), mites are more of an annoyance than anything. It seems they can be accurately diagnosed by a beginner, and treated effectively with a can of Provent-Mite or whatever it is called. No vet bills.

On the other hand, a pet store animal could have internal parasites or other things that you might not notice at first, and will require a trip to the vet to resolve the problem.

Why not buy from a breeder? Some people are worried about shipping costs, but you could always go to a show, or find a local breeder.

We got our girl at a show for $20. The savings compared to a pet store price paid for the extra gas to drive out of town to the show, as well as the entrance fee for our whole family. Plus we got to spend a wonderful day looking at all sorts of beautiful snakes and lizards and other cool animals.