I had a male normal ball live for 10 years in a tank, much of it in a 29 gal. He was very healthy the whole time until he died about a month ago. He was fed, and the day after he ate he was regurgitating the rat for some reason, and it got stuck in his throat as he was doing it. I wasn't around to see it happen, but I came home and found him with the rat in his throat, not breathing. Other than that he was an awesome snake to have. It was kind of hard losing him after that long, and had it not been for that incident he would have been around much longer.

My family has also had a Kenyan Sand Boa going on 15 years now. They're awesome snakes, especially when it's feeding time!