A faux-Tuscan meets neo-Prairie-style mini-mansion set in the rolling foothills high above Malibu’s picturesque, popular and pricy Paradise Cove was recently purchased for its full $4,995,000 million asking price by a mysterious trust controlled — so swears real estate yenta Yolanda Yakketyyak — by Grammy-winning singer, songwriter and producer Richard Marx. The seller, according to property records, was a Manhattan Beach-based philanthropist named Linda Sanders who made off with a hefty profit as she only purchased the property a bit more than a year earlier for $4.1 million.