The component with the lowest price in the REAR COMBINATION LAMP (E22) schematic is the Bulb(12v21/5w).
A sample from the products for the Rear Combination Lamp (e22) include: Lens,rear Combination Lamp, Washer, Gasket (nas), Bolt.
Of all the components used in this assembly the Lamp Assy, Rear Combination is the most expensive.