In a Sotheby's auction in Geneva, in April 1987, the Duchess's remarkable jewellery collection raised $45 million for the institute, approximately seven times its pre-sale estimate. Blum later claimed that Egyptian entrepreneur Mohamed Al-Fayed tried to purchase the jewels for a "rock bottom price". Al-Fayed bought much of the non-financial estate, including the lease of the Paris mansion. An auction of his collection was announced in July 1997 for later that year in New York. Delayed by his son's death in the car crash that also claimed the life of Diana, Princess of Wales, the sale raised more than £14 million for charity in 1998.