Some items from this specific schematic: Gear,oil Pump Drive, O Ring(d:2.4,id:15.8), Strainer,engine Oil, Circlip,10mm.
The most reasonably priced component used on the Dr800s 1996 (t) (e04 E18 E22 E34 E37) Oil Pump-fuel Pump is the Pin(4x15.8).
This Pump Assy,engine Oil is the most expensive of the items that make up this Oil Pump-fuel Pump assembly.