Some cheeky shoppers could be in to make a killing - reselling supermarket collectables at an eye-watering price.  

They're using the launch of Countdown's Lego-like brick collection to their advantage - re-selling the items on Trade Me for as high as $200.  

Trade Me spokesperson Ruby Topzand says told Kate Hawkesby it's not something new.    

She says the most recent craze was the New World SMEG Knife collection. 

“In the three months that that campaign ran, we saw over 600,000 searches for Smeg on site and it was consistently one of our most searched items.” 

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