Terri is very knowledgable about the breed and she breeds quality dogs. Boykins are still a relatively new breed and are pretty rare in Texas. They definitely are not a bargain buy if that's what your looking for but with that being said it's like most things in life, you get what you pay for.
With Terri or Texas Trace or any other quality breeder you are paying for a pup who's parents have had their hips, eyes, EIC, elbows and heart checked and have been cleared for breeding. You know your a getting a dog from healthy parents and the chances of you getting a dog with bad hips or eyes or anything else are slim to none. That's why they are priced as they are. You can go the bargain route and get a $600-$800 Boykin but you run the risk of getting a pup with bad hips from an inferior breeding.