Nigel Havers welcomes three more sellers to the Bidding Room, where they try to sell items to professional dealers who are on the lookout for interesting pieces, with help from expert Simon Bower.

Carl from Stoke has brought in a key that turns out to be not quite what it appears. Will the dealers work out what it’s used for – and if they do, will they be prepared to pay the price Carl is hoping for? Naz has brought in a harmonica. She wants to sell it so she and her young son can have a holiday. She is so determined to seal a deal that she brings her son into the bidding room to meet the dealers. They are wowed by him, but will it be enough to persuade them to buy the harmonica and help pay for their mini-break? Lastly, Martin from London is selling a hodgepodge of hidden treasure that comes with a fascinating story. He bought a piece of furniture, and when he moved it, he heard a rattling inside. Closer examination revealed a hidden compartment and inside were various items, including gold and silverware, an ornate pen and a propelling owl pencil. Individual items appeal to the dealers, but they are all being sold as one lot and have been valued at around £800. Martin will have to haggle hard. Will his hidden treasure turn out to be a goldmine?

Today's dealers are Adi, James, JB, Lucy and Tash. Will any of them match – or even top – the valuation placed on each of the items? Show less