The component with the lowest price in the C.D.I. MAGNETO schematic is the Ybs67-5 Washer, Spring.
Some items from this specific schematic: Screw, Pan Head (713), Pulser Coil Ass'y, Base, Magneto, Base Ass'y.
The C.d.i. Magneto assembly is constructed from several parts from which the Rotor Asy is the most expensive.