A 1955 Mercedes SL 'gullwing' currently costs around $2m at auction. When they come up.

A 1955 Mercedes SLR 'gullwing' Uhlenhaut just sold for a shocking $142m.

The only major difference between the two cars is the wonderful back story and history attached to the Uhlenhaut.

In this episode, David explains the value of a back story and how we can use it to get greater engagement from our audiences.