The Ball (12r) is the lowest priced item on this Starter schematic.
This schematic depicts all components used in the Ds7 1972 Usa Starter partslist.
Parts such as the Starter: Washer Plate 132172160000, Spring Torsion 278156650000, Cover,spring, Kick Axle Assy are included in the Ds7 1972 Usa Starter parts fiche.