Amazon Chief Executive Jeff Bezos, the world's wealthiest person, has bought the Warner Estate in Beverly Hills from media mogul David Geffen for $165 million, the Wall Street Journal reported on Wednesday, citing people familiar with the transaction. The deal marks a record for the Los Angeles area. Geffen purchased the 9.4-acre (3.8-hectare) estate in 1990 for a reported $47.5 million.