Seems a bit expensive for a 77 - probably non turbo as well. I sold my 82 turbo 280C a couple of years ago for under $60k and that had a zero time engine & new blades, I may well have got more if I waited but some of the machines that were for sale then are still on the market and not being used, piston helicopters like being used and unless they have been inhibited properly they can become problems.
I think there are an awful lot of underused machines out there for sale that the owners are looking for silly money for.