Of all the components used in this assembly the M/c Assy.,rear is the most expensive.
A sample from the products for the Rear Brake Master Cylinder include: Hose,m/c, Bolt,oil,10x22, Plate,diaphragm, Hose Comp,rr Brk.
The component with the lowest price in the REAR BRAKE MASTER CYLINDER schematic is the Pin,spring,2x10.