I sold one on craigslist two weeks ago with a fairly worn playfield, but good cabinet/backglass for $3000 in one day and had a waiting list in case the deal fell through. For comparison, the week before that I sold a Whirlwind in really nice condition for $2000.
FH is a great game and it's on a ton of peoples wish lists, so if you want one expect to pay a little more then you would for other titles from that time.
That said, make the guy an offer...be nice about it and see what he says.