That leak can be fixed. The o rings that hold the plastic tank need to be installed. There are two thin, clear o rings. They fit into little grooves inside the metal tank. One above, and one below the windows. They will appear to be too big, but they really do fit. They aren't fun to get in, but it is possible. Once they are in place, push the plastic tank back into place.
If that's the only problem, you're lucky

Most of them have major issues with the 510 pin and the deck conducting electricity.