The component with the lowest price in the OIL TANK schematic is the Bolt,hex,5x12.
Of all the components used in this assembly the Tank Fr,oil is the most expensive.
Parts such as the Oil Tank: O-ring,18.8x2.4, Cap,oil Tank, Washer Seal, Bolt,flange,8x176 are included in the Trx500fa 2011 (b) Australia Oil Tank parts fiche.