The component with the lowest price in the GASKET KIT B schematic is the Washer,plug Drain 14.
Some items from this specific schematic: Gasket,r Cover (nas), O-ring,16x1.9, Gasket,l Crankcas (nas), O-ring,14.8x2.2.
This Gasket Kit,b (nas) is the most expensive of the items that make up this Gasket Kit B assembly.