When my mechanic does this job, He always has the head trued, and then laps all valves and seats. New guides are installed and all cams are checked as well as lifters. Camshaft bearings are also checked. He replaces any component worn beyond spec.
Your price seems fair if a thorough job is done...Your motor will be good for another 100k miles.
92 500e, 85k, silver/gray,all stock.
96 Club Wagon,Hypertech chipped( College Hauler)
97 320 SL 50k
1980 BMW e21 323 Baur conv.
1990 300GE 99k