We've got one at the moment.
Really lovely Volvo S40 Sport. Incredible History, really a proper car.
Phones up and start complaining that they want a full refund because they can't find the locking wheel nut. Refuse to accept that it is in the car, as we show all our customers that it is present and where it is when going through our PDI, and the PDI is signed to say they've recieved it.
Suprise suprise, the same day he starts complaining a Volvo S40 Sport has come up for sale for £600 (ours was £2.5k). This one has 70k more, No History and doesn't drive as it needs a new clutch. He was saying that he'd rather have a diesel than our petrol, but there are just no diesel Sport ones around.
We've had 20 Facebook messages, 30odd texts and 3 phone calls going on and on about this bloody wheel nut. Sent him an F-Off letter, and haven't heard anything since.... Yet....