When I sell a spider, I ask if the buyer knows what they are getting into. For that matter when I sell any snake I ask if the buyer knows what they are getting into. That said, no matter what I buy I do a little research. I typed "ball python issues" into google. The first thing that came up was OWAL's site where every known issue concerning ball pythons is to be found. Not too hard. If an owner cannot do at least that much they are probably too lazy to own a snake. Before the internet, people actually had to go to the library and do some research. These days the information is pretty much at your fingertips. There is no excuse for not knowing.