20 years ago I went to a Chevy dealership for brake pads for an S10. A freaking S10. They wanted $210.00. I bailed and went to Vato Zone. At the time OE pads from a dealer for my F250 we're around $55.
LONG time ago the GF needed brakes done on her VW Jetta - dealer quoted 1300. I went to Auto Zone and did the job in the driveway for 335.
She also had an issue with it hunting RPMs at idle. I called dealer - said I was a different shop, had one in and wanted to know what to look for - you know, service writer to service writer. Guy says "Pull the air box lid off, you'll usually find a dirt ring in the tube to the intake. Clean with mineral spirits and run a bottle of injector cleaner in the tank. We charge 900 for it". I did so, injector cleaner was what,7 bucks and the cleaning took 15 minutes. So that shop was looking at 850 in profit on it. Same dealer as the brakes - I'll never shop there for anything.