I don't know what his source is either, but David confirmed it so that's good enough for me.
I said "if they are selling" and went on to say that, in business, anything is for sale at the right price.
I'll give you a practical and real example: Around 1966 I built Ecuador's first FM station. I already had my market's three top AM stations, and I wanted to have an FM for fun because my first radio job was mostly at an FM back in 1959. I had no expectation of making money, and enjoyed hearing "my station" in all the boutiques, little stores and restaurants in the better neighborhoods of the city.
But a friend and client, after I told him many times "no commercials", took me to lunch at his private club. Nice touch. He knew the highest rate of my "best" station and he offered four times that rate to be on the FM. All he asked was to have line exclusivity; he produced the only instant coffee in Ecuador, so that seemed easy to do. I said "no jingles, and only 20" spots". He said fine, "send your agent with the papers tomorrow." He then went on to tell me stories about the soccer team that he was the president of. And I realized I suddenly had a profitable FM radio station when I had thought I was never going to sell ads and, probably could not sell them had I tried.
Within a month, all 6 twenty-second avails each hour was sold. Two minutes of ads an hour, and it made as much as any of my AM stations. All because I had a price.
In fact, everything in business has a price. Sometimes we put a price that is prohibitive, but if we get it anyway, we take the money and start a new business.