Welcome to Pro Cars Quality used cars for sale in Watford, Hertfordshire Here at Pro Cars, we pride ourselves in our range of second hand used cars. Pro Cars are a specialist used car dealer based in Watford. Pro Cars is a family-run business with years of experience. We are proud to offer you first-class customer service and very competitive pricing. All our vehicles are handpicked and mechanically inspected. All our vehicles are prepared to a high standard and come with a warranty. Our dedicated team are here to provide the highest level of expertise and advice when finding the right car for you and are on hand for any questions you might have.