Some of you people must live a quiet life. On average we get a couple of cold calls a week, but some weeks we get as many as a dozen. I'm usually doing something when they call and have to put things down, before going to the door. Hence the no callers sign. I will never buy at the door, and anyone who does is almost certainly not getting a bargain.
Should I need insulation, a new service provider or anything else I'll shop around and get three quotes. So any cold caller is wasting his/her time, and mine.