Bonhams Auctioneers, Collectors' Motor cars and Automobilia at Goodwood 2012. Bonhams smashes world record prices for Bentley and Rolls-Royce in £22 million Goodwood Festival of Speed Sale. 'Birkin' Bentley at £5 million is most expensive British car ever sold at auction, while 'Corgi' Rolls-Royce sells for record £4.7 million. The next highest sale price was achieved by "The Corgi", a 1912 Rolls-Royce 40/50hp 'Silver Ghost' Double Pullman Limousine, which sold for a record-breaking £4.7 million. Specialist James Knight.