That person shouldn't have any animals PERIOD. That is absolutely atrocious to leave any living creature in such a state. The snake deserves to be rescued and this jerk deserves to be reported for animal cruelty. Definitely, no matter what you do, do NOT give this guy your Leos. They will suffer horribly and probably be dead within a year or two. Man, nothing makes my blood boil more than seeing any animal suffering due to the inadequate care of an idiot. If you do decide to buy this snake and rehabilitate it, definitely practice strict quarantine procedures. It will more than likely have a bad mite infestation, quite possibly have an RI and will need veterinary care to get it back on the right track. Best of luck!