Of all the components used in this assembly the Arm-comp-swing,f.s.bl is the most expensive.
Some items from this specific schematic: Bolt,socket,6x18, Adjuster-chain, Circlip,42mm, Sleeve,20.1x28x236.5.
The component with the lowest price in the SWINGARM schematic is the Nut-hex-small,8mm.