Not too sure about that, shortstripper. When I came to sell my aircraft some years back I had a string of folks coming to view it and, of course, wanting to have a quick test flight. I had the distinct feeling with some of them that their principal though unstated objective was
to get some free flying and keep their licence valid !
Only one person ever offered to pay for fuel - even when I had positioned to their local airfield. But there .. maybe I am just being a cynical old sod.