i used to work in a car repair shop and one lunch time, two irish folk pulled up in a van offering electrical goods. 2 work colleagues were interested in a laptop and digital camera they were selling, so much so, that the one bloke rang his wife at home and told her to bring £250 for the laptop and digital camera. i watched the exchange take place and the van drive off. now, when i mean watched, i mean i was looking in at the cab and saw them display the laptop working, shut it down, zip up the case, hand it over and take the money, same with the digital camera. the bloke took the laptop bag into his work area and couldn't get the zip open easily, he did it after a little force and was greeted by onions and other packaging, same for the digital camera. the zip had been super glued to give them time to drive off (not that you'd really want to confront these people) but i could not get my head around how they did the swap because i watched them very closely.