I recently and unexpectedly became the brand new owner of a small box turtle after one stumbled into my backyard. After getting the confirmation from a herpetological society that I couldn't release it back into the wild, I went browsing at Petsmart but couldn't find anything very substantial for turtles. A Yelp search subsequently directed me to Predator's Reptile Center.
The shop is small-ish, but they pack a lot in the space they have. They have an entire wall of various reptiles, and various terrariums, accessories, and food for your cold blooded friend. I picked up some box turtle food, a food dish, log burrow, and calcium block. Prices are reasonable and cheaper than what I saw at Petsmart for the exact same product.
Service was excellent. You can tell the employees and owner put a lot of care into the shop and everyone here was very helpful and friendly.