Of all the components that make up this Rear Swinging Arm the Pin 20x20 has the lowest price.
Parts such as the Rear Swinging Arm: Bush, Bolt(10x39), Nut 16mm, Washer are included in the Gs1100e 1980 (t) Usa (e03) Rear Swinging Arm parts fiche.
The most expensive part in this assembly is the Rear Swinging Arm Set.