The component with the lowest price in the FR. BRAKE MASTER CYLINDER schematic is the Screw,flat,4x12.
Some items from this specific schematic: Nut,flange,6mm, Bolt,flange,6x22, Sub Assy,fr M/c, Ring.
This Sub Assy,fr M/c is the most expensive of the items that make up this Fr. Brake Master Cylinder assembly.