Id've thought the idea of Fedexing a RIB to a buyer would be a giveaway enough in its self
The prolfieration of scams is making it difficult to sell anything these days. When I sold my car before leaving Blighty I had a very persistent foreign gentleman on the phone who wanted to buy it and export it to Cyprus. Now he could have been 100% genuine but frankly too much risk so I put him off til he went away. Add that to the "carsearch" scams (Give us a tenner and will put you in touch with our register of people desperate to buy your motor) and it was a right pain in the wassnames.