The Nut,flange,6mm is the lowest priced item on this Seat (b/e/f/h/po) schematic.
The Seat (b/e/f/h/po) is made up of components including this Seat Comp.double T1 which is the most expensive.
Some items from this specific schematic: Seat Comp.double T4, Seat Comp.double T3, Bag,service Book, Bolt Flang 6x12.