The most reasonably priced component used on the Gl1500 Goldwing 1989 (k) Switzerland / Kph Headlight is the Screw,tap.,4x12.
Of all the components used in this assembly the Set,head Light As is the most expensive.
Some items from this specific schematic: Screw,tap.,4x12, Set,head Light As, Nut,special 16mm, Nut Beam Adjust.