1935 Aston Martin Ulster , the Works Demonstrator on offer at Bonhams Quail 2020 1935 Aston Martin Ulster (US$1,200,000 – 1,400,000), the Works Demonstrator Auction: Bonhams Quail 2020 Home » USA » California » Monterey Week Auctions » 2020 Bonhams Quail Auction (Highlights Preview) » 1935 Aston Martin Ulster , the Works Demonstrator on offer at Bonhams Quail 2020