Some items from this specific schematic: Nut, Castle (6e5), Propeller (3x13"x17"-kl), Ybs67-10 Washer, Spring, Water Seal 1.
The sub assemblies and components that make up this Lower - Drive 2 include this Propeller (3x13"x17"-kl), the most expensive part.
The component with the lowest price in the LOWER - DRIVE 2 schematic is the Clamp (6e5).