Used car dealership located in Buckeye, AZ. Duncan Auto Sales is a premier West Valley Auto Dealership offering Used Vehicles, including: Coupes, Convertibles, Minivans, Sedans, SUVs & Trucks. We guarantee competitive pricing, knowledgeable staff and superior customer service for all our customers, along with financing options. Duncan Auto Sales is proud to create a simple and painless way to purchase a world class automobile at a great price. Find us on the North side of Maricopa County MC 85, between Baseline and Watson Road.