The lowest price component in this Speedometer / Tachometer parts-list fiche is the Screw,pan,3x10.
Some items from this specific schematic: Bulb,wedge Base, Stay,meter, Box Assy.,pilot, Screw,oval, 4x8.
The Speedometer / Tachometer assembly is constructed from several parts from which the Box Assy.,pilot is the most expensive.