I bought mine from Petco, and haven't had a problem with him yet. They told me they were feeding it frozen pinkies, and he wouldn't look at anything other than a live adult mouse so I doubt they had him feeding well.

Anyway, even though I had a semi-positive experience from buying it there I don't plan on doing it again. I recently went to a reptile show and had some great conversation with several breeders, and plan on going through one of them to expand my collection. It just seems like the best way to me now.