Is that commonly done? I'm afraid he will balk at that? What does a removaly typically cost
It is very common. Have the sale be contingent on tank removal. as well, there are numerous innocent landowner laws, depending on the state you live in, that can protect you.
Depending on the type and size of the tank, it can cost anywhere from $2,000 - $10,000 and more to remove.
Do not purchase without a contingency.