The component with the lowest price in the TAILLIGHT schematic is the Screw,pan 4x12.
The Taillight is made up of components including this Taillight Unit which is the most expensive.
Parts such as the Taillight: Taillight Unit, Bolt,flange,6x28, Bulb,tail Light, Rubber, Cushion are included in the Cb750sc Nighthawk 750 1983 (d) Usa Taillight parts fiche.