Is it specifically made as a reptile tank?
If so, is it meant to be filled to the top?
One of the LFS here set a curved reptile tank up (did not look the same as this one, though, and was probably twice the size if not more) for marine - it lasted for a while until they came in one day and found everything on the floor because it had broken.
Not trying to scare you off the sale, but something to consider.