It's a listing gimmick to get a steady flow of people to come through the door to generate business for people sitting on their butt in the bullpen office waiting for the phone to ring. 

If you give it a couple taps on the side it should sound empty, or have a ring to it.

So I'm reading this thread of "stories" and thinking of a litany of my own experiences over the years and the phone rings.

Mark,Give me a ring when you get time I should be able to get you some skill trade guys that I use to give you a hand. 

I keep a key for each unit on a key ring in my truck as well.

My BS meter is ringing.  

And basically anything that rings a bell would be helpful.The reason i am asking about this is i am trying to understand if there is a market need (pain) to make revenue streams more predictable and to insure away such risks.

They claimed they had a diamond ring in a sock somewhere and it was now missing.

I think with searching for motivated sellers it's YOUR phone that is going to ring if you do it right from all I've heard, though @James Reynante will know better.

This one really reached for the brass ring.