Greater Manchester Police are investigating a scam in which victims were conned into handing over hundreds of pounds for a bag of potatoes.
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.
Both men are believed to be in their late 30s. One has a scarred face, is around 6ft (1.8m) tall and has stubble or a goatee beard.
The cases were reported in Bury, Hulme and Ashton-under-Lyne between 15 February and 1 May.