I'm glad you took the Ball python into your care, I think she will do a lot better in your care.

The ReptiTemp 500R is the cheapest, yet works brilliantly. I purchased one and I love it. It keeps all my tubs at the right temp, so I have no worries. I also bought another at a reptile show for a back up just in case, but I'm positive this thermostat will last a long time. You can purchase it here: http://www.reptilesupply.com/product.php?products_id=75

I bought my first one from this site when it was down to $24, and the entire purchase (+ shipping) was only $32. At the reptile expo I purchased it for $32 or $33 I think, which isn't that bad of a deal at all. It has two outlets, but I got an extension cord and plugged that in so I have more outlets to plug in more UTHs LOL