For sale, $100 million mansion—but with a catch

The ancestral estate of Christian de Guigne IV, 76, is on the market in Hillsborough, but assuming anyone’s willing to pay the $100 million price they won’t be able to move in until after he dies. That’s the deal being offered for the 16,000-square-foot Tudor mansion on 47.5 acres. The agency trying to sell the house is said to be buoyed by the November sale of investor Tully M. Friedman’s estate in nearby Woodside—for a cool $117.5 million, the Mercury News says.