Prince Harry and Meghan Markle bought their new California mansion from a Russian businessman with a $9.5million mortgage after the price was knocked down by more than $10million, DailyMail.com can reveal. The couple bought the sprawling nine-bedroom and 16-bathroom mansion in upscale Montecito for $14.65million on June 18, making them neighbors with celebs Oprah Winfrey and Ellen DeGeneres. The 14,563-square-foot home, known as ‘The Chateau’, sits on 5.4 acres of land and immaculately clipped hedges border the estate’s stone-pillared entry gates. The seller is thought to be Russian tycoon Sergey Grishin who bought the ‘palatial’ mansion for more than $25million in 2009 and had tried to sell the home for up to $34million before eventually accepting a loss. Grishin is also the former owner of a different California estate – known as the Scarface mansion because it appeared in the 1983 Al Pacino movie – which sold for a similarly cut-price $12million in 2015. Property listings say the home took nearly five years to build and included a library, office, spa with a separate dry and wet sauna, a gym with a stripper pole, game room, arcade, theater, wine cellar and five-car garage. Prince Harry and Meghan Markle’s $14.7million home in Santa Barbara, California,…