Unscrupulous or Not?

I had a company come out yesterday to give my air conditioning units a check-up for the coming summer. Within 5 minutes the service guy told me that he noticed I did not have leak detector/shutoff valves on my 3 hot water tanks. As luck would have it he happened to have 3 units on his truck that he could install for $199.00 each, on special. Later he offered to…