When you get a snake in from this kind of background, it's always a good idea to take it to the vet for a once-over. I was given an adult BP a year ago by owners who said he was too "nippy." He came to me crammed into a filthy 10-gallon tank with inadequate heat and humidity. Soon after I got him into a proper set-up he started doing weird behaviors like side-lying. There were no other symptoms, but it was too strange so I took him to the vet just to be safe. Turned out the snake had been brewing a bacterial infection for some time before I got him. It had just begun to manifest as blister disease the morning he saw the vet. So, long story short, you just never know when you get a snake from poor circumstances, and it's best to catch problems early while they're (relatively) easy to treat. Good luck with your new friend!