[si Banker]

The 1984-1989 911s had the rubber center on the clutch on the US market cars. Although it was stronger than the 1978-1983 SCs it is still a weak point and with 50k miles is probably approaching the end of it's life. The clutch material does not need replacing but the rubber center is what breaks.

I paid around $6,000. for my top end rebuild which included a set of stiffer springs and new steel studs. I replaced other compo nets while the car was apart some of which were, the clutch, a set of cams, rod end bolts, oil sending unit and chain rails.

My valve guides started showing signs of leaking at 42k miles. The car you are interested in may not have a problem with the guides.