The lowest price component in this Rear Swinging Arm (model N) parts-list fiche is the Bolt 6x20,with Plain Washer.
Some items from this specific schematic: Swinging Arm Assy, Rear, Nut, Screw, Center, Buffer,chain Touch Defense.
This Swinging Arm Assy, Rear is the most expensive of the items that make up this Rear Swinging Arm (model N) assembly.