Looking back a few years I think the first time I wound up a cold caller was when I was at my wife's flat some time before we were married.
The man was very keen to tell me about the conservatories they were selling. I feined interest and asked all sorts of questions and eventually we got around to booking an appointment.
He must have been feeling pretty pleased with himself for getting a sale, but he was soon to be deflated
"So what's your address?".
"Flat18, 4th floor, Witchcoate point"
He interrupted me. "4th floor?" "Yes" I replied, "We are on the 4th floor"
"So you don't have a garden?"
"No, but we do have a balcony. You can build a conservatory on a towerblock balcony can't you?".
The line went dead