The most reasonably priced component used on the Gn250 1998 (w) (e02 E04 E22 E24 E25 E34 E39) Starting Motor is the Washer,lock.
Of all the components used in this assembly the Motor Assy,starting is the most expensive.
Some items from this specific schematic: Seal,oil, O Ring, Armature, Bush,b.