I've gotten zinged even at my own home shop
I've gotten bitten even at my own home shop so maybe I was due for a deal in the greater scheme of things. I had my local shop replace the water pump. They charged 6 hrs in labor even though it only took three because in their words "a guy stood behind the guy doing the work and handed him the tools, it was easier that way". Just like a surgeon. I think they maybe had a spare guy that day with nothing to do and wanted to book his time like lawyers do. Then they charged $227.72 for the water pump part itself which is about $130 on the web.
I'm taking my RV in locally again and going to try a new shop. I've got my fingers and toes crossed for a good one. I joined the local Winnebago group specifically to get people's recommendations on mechanics in the Denver area and no one could recommend anyone they had been to and that is really sad.