Of all the components used in this assembly the Primer Pump Assy is the most expensive.
The Clamp (3y2) is the lowest priced item on this Air Cleaner schematic.
Parts such as the Air Cleaner: Hose(8x8), Clip (7r4), Fuel Pump Assy, Clip (806-24356-00) are included in the Br250tm 1988 Air Cleaner parts fiche.