The component with the lowest price in the TURN SIGNAL LAMP schematic is the Screw.
The most expensive part in this assembly is the Relay Assy,turnsignal.
Parts such as the Turn Signal Lamp: Nut, Bulb(12v18w), Bulb(12v18w), Lens are included in the Gsxr750x 2005 (k5) Usa (e03) Turn Signal Lamp parts fiche.