There is an apparently very fine of this rare and good TT on ebay
As far as I know, the tables themselves are very reliable so much will depend on the condition of the MC.
Collapsed/stiff suspension (and wear) is a possibility but with a little bit of further investigation/enquiring to the seller a little more light may be shed on this.
Re-tipping is possible.
If I had'nt just gotten a SL-7 and already have several others I would be very tempted. - Hell, I am very tempted now so someone please do me a favor and buy it.
Make a slightly lower offer and you may get it cheaper. Superb turntable.