just booked my car in for service and MOT

comes up to about 150quids which isnt too bad, asked them to fit my coilovers and roll bars.........400QUID!! ur havin a laff VW.
taking to to local garage and costing about 100pounds, why is it soo expensive to be done by VW, they stated it will need aligning so why does that make it soo expensive.
