Of all the components that make up this Headlamp (e2, E24) the Bulb(12v5w) has the lowest price.
Some items from this specific schematic: Cover,socket, Nut, Headlamp Assy, Bulb(12v5w).
With a quantity of four pieces, the Washer(6.5x20x1.6) is the most used part in the HEADLAMP (E2, E24) diagram.