Ok back to helping this sav out. What have you been feeding?

Even though most don't need UVB, this guy could be suffering from a poor diet from the previous owner and might benefit from some uvb to offset potential metabolic bone disease.

first I would get him into a larger tank, with a much hotter basking spot. A good soak in warm water for hydration and some dusted roaches and maybe a pinky mouse if he will take it.