He was listed as having properties worth £120 million in the 2011 "Estates Gazette Rich List". In the "Sunday Times Rich List 2017", ranking the wealthiest people in the UK, he was listed with an estimated fortune of £110million. In 1985 he sold "Adoration of the Magi" by Andrea Mantegna at Christie's in London to the Getty Museum for a then-world record auction price of $10.5 million (£8.1m). In November 1993, the Appellate Division of the New York State Supreme Court confirmed his claim to the ownership of the Sevso Treasure, a hoard of late Roman Empire silver.