This almost exact operation is all over north america. They must catch quite a few people.
The problem in my mind is that they will become more sophisticated at one point or another. Then you will have to extremely dilligent. Right now they appeal to peoples greed primarily. Usually the mercedes is the divorce residue and the woman does not know how to drive.
I far preffer the story where the car is advertised for a dollar. The unbelieving purchaser phones to clarify the price. Rushes over and indeed the car is one dollar. He decides to take the risk. The worse that may happen is a reposession.
As he is leaving with the car he asks the lady why was the car only a dollar? She responds her husband ran away with the office girl a few weeks ago. He telephoned yesterday and asked her to sell his mint mercedes and send him the money. She was really only doing her duty as a wife and would send him every penny.
I know women that may be even more vindictive if an issue came up like this. I am married to one I think.

Come to think about it I am certain I am.
The old adage of if it's too good to be true it usually will be still applies.
We all hope for the exceptions but they are very infrequent normally.