Two of television's best known antiques experts - Mark Franks and Lorne Spicer - are pitted against each other at a car boot sale, where they must spend 250 pounds of their own money purchasing the items that they think will make them the most profit. They then have to sell their purchases with the aim of making as much money as possible, testing their knowledge and expertise to the limit. There can only be one winner - the expert who makes the biggest profit.