The component with the lowest price in the TAILLIGHT(S) schematic is the Nut,flanged,6mm.
Parts such as the Taillight(s): Lens,tail Lamp, Nut,flanged,6mm, Damper,10x24x12, Collar,l=13.1 are included in the Kmx125-a4 1989 Europe Uk Gr Nr Sd St Taillight(s) parts fiche.
The Taillight(s) assembly is constructed from several parts from which the Lamp-tail is the most expensive.