They should be happy for the service business. What are they quoting you? I am always amazed what people tell me they are charged for brake service, it is highway robbery. On top of that, if you buy the parts from them, you will pay at least double what you can get them on your own for. I have done so many brake jobs and if I had a lift (I have all the tools and a compressor/impact) I could do pads and rotors front and rear on a car in good condition in an hour. Even at a steep hourly shop rate, you should not pay more than $100, I would personally give the guy that performs the work $20 tip for sure as a good gesture. Now if you car is a bitch to work on, rusted and takes more time, you should pay more.
Just this week, my boss with a Range Rover (an independent shop) was quoted $1400 for front pads and rotors and rear pads and rotors TURNED, not even replaced. I searched out the parts and could get pad and rotors for under $500 shipped to my door. So that place is charging $900 for labor, that shop should be burned to the ground! Believe me, I run a multi million company and all too aware that you must make a profit and you should, but this is just wrong!