I don’t know about not selling if they are on live or not but about 25 years ago I experimented and only kept and bred frozen thawed eaters together. Guess what they produced? Frozen thawed eaters. I have NEVER had to use live to get ANY ball python I bred feeding. Go figure. So to answer the question I would NOT buy a live feeder ball baby or adult from anyone. I think it’s slightly genetic. Just my preference.