I once bought a mondeo with 157k on it & had no service history but drove very well. In the time i had it apart from servicing i only changed full exhaust & a used cat as it blocked silencer.
Looks decent. My diesel focus I brought from family was 90% motorway miles and is sweet. Done 127000 and still on the same clutch. 85000 is certainly nothing to worry about, even on a petrol.