My bp has always been a climber, too. Started out in a 3.5' tall enclosure (if I remember correctly), and he pretty much lived in the tree I had in there. He'd even eat in it. Now I've got him in a 4'x2'x2' and he loves to bask on his basking shelf during the night and crawl back into his hides during the day. He wasn't bought from Petco, but he was bought from a pet store. Pet Supermarket, not sure if it's still around or not, haven't seen any in a couple years. He's 10 years old now.