Of all the components used in this assembly the Pulser,cdi Hitach is the most expensive.
Parts such as the Water Pump - C.d.i. Pulser: Pulser,cdi Hitach, Seal,mechanical, Nut,cap,6mm, Gasket,pulser Cov (mca) are included in the Cx500 1978 France Water Pump - C.d.i. Pulser parts fiche.
The lowest price component in this Water Pump - C.d.i. Pulser parts-list fiche is the Screw,cross,5x16.