The component with the lowest price in the POINTS / SPARK ADVANCER schematic is the Screw,cross,5x12.
Some items from this specific schematic: Screw,cross 5x20, Gasket,contact Bk (nas), Oil-seal,15x25x7, Washer, Lock.
This schematic depicts all components used in the Cb100k0 Super Sport1970 Usa Points / Spark Advancer partslist.