TV's Mark Evans relishes a challenge. He's built a supercar from scratch, put together a 200 mph plane and painstakingly restored various rusty wrecks back to their former glory and all in front of television cameras. He's even built his own helicopter. But, in this, his latest quest, Mark takes on a more down-to-earth challenge shared by millions of motorists every year: How to get the best price possible for... see more