Have you ever seen a WC snake?
Out here, we find many many rattlesnakes and bullsnakes, and they appear the pinnacle of health. Don't compare imported snakes to captive bred ones. How would you feel if you were stuffed in a bag, flown thousands of miles, underfed and dehydrated. Probably not the best either.
Let me restate this so that you guys understand more. Vanan offers Ramses a meal everytime he feeds, but his bp only takes a rodent 1/6 meals. We have kept this snake in a tank with heat pad and heat light, in a rubbermaid with heat tape, and even allowed him to free roam in a sealed room and allowed him to come down and feed himself when he felt like it. And well, he only feels like feeding once a while.