Had an old chap a few years ago do this to me. He must of test drove about 4 convertibles over a 6 months period, always discussing his BMW p/x etc etc and spending a good couple of hours with him each time, felt like I was married to him at points. Finally we agreed on a deal, think it was a BMW or Merc and he had left his wallet at home, he would phone me with a deposit as soon as he was back. Never heard from him, left messages and not a thing. This was about 10 years ago. The about 2 years ago I get a call on a SLK, customer has a BMW p/x, I notice its the same bloke, but now he just asks question upon question. The next convertible I get in the same happens. In the end I saved his number in my phone as 'Fruity Nutcake' and ingored his calls.