Secret Dealers Season 4 Episode 13 Episode 13

Dealers Mark, Tim and Alison fight it out for, amongst other things, an incredible collection of militaria, a World War One flying helmet which Alison wants to turn into a 'steampunk' accessory item, and thirty Steiff stuffed teddies and animals in mint condition. With over twenty two thousand pounds on offer how much of his precious collection is Rob willing to sell?