The component with the lowest price in the MIRROR schematic is the Nut,flange,5mm.
Some items from this specific schematic: Actuator (r) Comp, Clip, Mirror Garn, Garn,r Door*nh1l*, Mir Assy *nh623m*.
Of all the components used in this assembly the Mir Assy Lh*b92p* is the most expensive.