Some items from this specific schematic: Stopper, Pin, Dowel, Screw, Pan Head(8x0), Screw, Panhead (8g8).
The most reasonably priced component used on the Xt350'88 1988 55v0 Europe 1855v-300e1 Crankcase is the Screw, Panhead (8g8).
The most expensive part in this assembly is the Crankcase Assy.