The E-12 Pulse Generator-advancer(gl1200e-de-ie-ae) assembly is constructed from several parts from which the Gen.set,pulser is the most expensive.
Some items from this specific schematic: Roller,4x17.8, Gen.set,pulser, Shaft,pulser, Washer Setting.
The component with the lowest price in the E-12 PULSE GENERATOR-ADVANCER(GL1200E-DE-IE-AE) schematic is the Bolt,hex 6x14.