The component with the lowest price in the REPAIR KIT 1 schematic is the O-ring(1wg).
The Repair Kit 1 assembly is constructed from several parts from which the Power Head Gasket Kit (nas) is the most expensive.
Parts such as the Repair Kit 1: Gasket, Thermostat (nas), Oil Seal (18x30x5-663), Packing, Valve Seat 1 (nas), O-ring (371) are included in the E48mhy 2000 Repair Kit 1 parts fiche.