Parts such as the Front Fender - Rear Fender: Clip (156-83525-00), Ybs67-8 Washer, Spring, Nut(6l2), Grommet 395845180000 are included in the Xs850 1980 (a) Usa Front Fender - Rear Fender parts fiche.
The Washer,spring is the cheapest item from this partsfiche.
Of all the components used in this assembly the Front Fender Comp. is the most expensive.