Personally Brian I'd contact local Humane Law Enforcement. That anyone allows a living creature to come to this shape is disgusting, to know that this person runs a business that's based on the sale of living creatures is even more so. I'd go back and take pictures immediately, note the vet's name and have the rescuers request a copy of the vet's findings, meds given, length and weights on each snake at intake.

A friend of mine just rescued a terribly emaciated young Iguana (this one from a private owner). This is what she was instructed to do when the officer came to her home to examine this poor lizard. Not all areas will file charges but I think you should encourage them to report this business and insist it at least be inspected due to the condition of the snakes coming out of that business. If they'd starve snakes then one has to wonder what other creatures are suffering under their dubious "care".