When we had people want to negoiate, we'd tell them have a nice day.
By the way, the shop saw you comming. See what you can do to present yourself as not someone overflowing with money; otherwise, the industry will see you as a milk-tit. That's the way it goes in the automotive repair industry.
Merv, These to statements side by side are very interesting. It would almost appear as a direct contradiction if you dig into them.