Of all the components used in this assembly the Tail Lamp is the most expensive.
A sample from the products for the Taillight ('82-'83 Ke175-d4/d5) include: Tail Lamp, Collar-battery Case, Washer-spring,6mm, Nut,6m/m.
The lowest price component in this Taillight ('82-'83 Ke175-d4/d5) parts-list fiche is the Washer-plain,6mm.