Auto Trader is presented by Mike Brewer and Edd China, who have worked together on other TV series, including Wheeler Dealers. The programme is set in the fictitious garage called Mikes Motors.
Mike introduces a buyer who is interested in purchasing a certain type of car eg: small hatchback, luxury car etc. He has three cars on offer, and the buyer decides which ones he is interested in, taking usually two for a test drive. Mike gives detals of any potential problems with the cars. At the end of the episode, the buyer decides which car he has chosen to buy.
Edd meets a seller who has been trying to sell their car for a number of weeks. There is usually a reason why the car hasn't sold and Edd works with the seller to repair and clean the vehicle.