To discover just how effective price slashes are, the show takes over an independent supermarket and imitates the methods of the big supermarkets, following research done by Loughborough University. In a Liverpool clothes store, super seller Jimmy starts a pop-up vintage stall. But the 'vintage' fashions are actually cheap, modern cast-offs. Will the shoppers fall for his sales patter? And the show reveals how some retailers could be tricking people into buying £50 HDMI cables, when in reality they could be buying one that's just as good for a tenner.