Quote Originally Posted by Vanthios View Post
Also according to the linked guide, ball pythons will move about the cage to adjust their own temperature, yet he hasn't moved. If he was cold and didn't move, then became hot and didn't move, what gives?
He's probably stressed. From what you say, the previous owner may not have done such a great job taking care of him. Now, in the last 24 hours, you moved his home and changed his whole life around.

When they're settled in and acclimated, they'll move around to adjust temps, but when they're anxious or stressed it's very likely he'll find a place he feels safe and just camp there until he feels a bit more secure.