It is funny, I had the opposite experience to what BigWheeler is claiming.
I was told, by Raymond, certain things needed to be done to get my car running again (tune-up, timing-belt and water pump, distributor, ect). When he told me the items needed to be done, I knew right there he was full of it. I have knowledge of the last 60k miles worth of repairs, and even have a sticker under my hood that shows my timing belt (and water-pump) where changed at a certain period not to long ago. Obviously he didn't do much inspecting under my hood if he fails to miss the sticker and just assumes that kind of repair needed to be done.
So, when I confronted him about everything he tries to tell me it is still going to be 700 dollars to fix the ""problem."" I tell him I want to take my car somewhere else, and he tries to tell me I owe him 75 dollars for his diagnosis on him assuming things are wrong. I had to bring his attention to the service sticker for the T-belt, which shut him up.
The actual problem, which I found out from the next shop I took it to, was some component in the distributor went out, and a spark plug wire (which I neglected to do during my last tune-up) was going out. I had these issues fixed for a little over 300.
Obviously, not recommended.