Two experts from the world of antiques go head-to-head in a competition to raise money for a charity of their choice. They are challenged to buy antiques and collectibles in a different location each day, and at the end of the week the duelling dealers compete to raise the most money at a special one-off event. Once the deals are done, one expert will be crowned the Put Your Money Where Your Mouth Is champion. Antiques experts Phil Serrell and David Harper compete to make the most profit buying and selling items from a carboot sale.