The component with the lowest price in the CRANK BALANCER schematic is the Spring.
A sample from the products for the Crank Balancer include: Pin(4.5x9.5), Race,crk Bal Driven Gr Inner, Shaft,crank Balancer, Bearing(25x62x17).
The Crank Balancer is made up of components including this Gear,crank Bal Driven(nt:46) which is the most expensive.