The component with the lowest price in the F-15 schematic is the Clip B7,tube.
Parts such as the F-15: O-ring, Tube,drain, Joint,fuel Tube, Bolt Flang 6x12 are included in the Scr100wh 2007 Spacy 100 Jf13-120 Japan (jdm) F-15 parts fiche.
The F-15 is made up of components including this Tank Comp,fuel (jdm) which is the most expensive.