Of all the components that make up this Camshaft/valve the Seat,valve Spring has the lowest price.
The Camshaft/valve assembly is constructed from several parts from which the Camshaft Comp.,in is the most expensive.
Some items from this specific schematic: Shim,tappet (1.95, Shim,tappet (1.57, Shim,tappet (2.20, Shim,tappet (2.45.