In a brand new series four of Britain's top dealers in art, antiques and collectibles wait in four separate rooms, each prepared to spend their own personal fortunes if the right item comes through their door. From memorabilia to a mummified mermaid, and from art to antiques, members of the public have come to sell their prized possessions, hoping to walk away with a life-changing amount of money. But to do so, they have to work out when to sell and when to see the next dealer, because once they leave the room the offer is off the table for good. This first episode features a collection of Christmas cards from Princess Diana to her personal chef, an original 1960s Dalek, a cigar owned by Winston Churchill, and a Francis Bacon portrait all but destroyed by the artist. Will any of them make their owners rich?