The component with the lowest price in the REAR CUSHION schematic is the Washer, Flat, 10 Mm.
The Rear Cushion is made up of components including this Cushion Assy., Rr. (showa) which is the most expensive.
Some items from this specific schematic: Washer Sprkt Set, Collar Cushion, Washer, Flat, 10 Mm, Cushion Assy., Rr. (showa).