I'm assuming the scammers must stuff the potatoes inside a laptop box. Otherwise I'm not sure how they convince their victims to walk away with a bag of potatoes instead of a laptop.
Manchester police appeal over potato laptop fraud
Police say at least four people have been approached by two men offering to sell them a laptop or iPhone. One man paid up to £1,400 and walked away with a rucksack full of potatoes. Other victims received bottles of soft drinks. Police said the conmen spoke with an Eastern European accent.