It is a rare game, but there is almost no demand for them, and it isn't THAT rare since it came out in like 89, most ops don't convert a game less than 5 years old, which brings it up to 1994, at which point the arcade was dying fast, and that cab is weird, so they tended to get warehoused rather than converted at that point.
I REALLY doubt the buyer is going to get the asking price.