Location: Westport, Connecticut Price: $15 million A 20-acre waterfront estate once owned by shopping center magnate Richard Stiegler in affluent Westport, Connecticut, has hit the market for the first time in 65 years.After Stiegler’s death in 1967, his widow and two children continued living on the estate, expanding the main 1940s house into a 6,215-square-foot mansion and occupying two adjacent guest cottages. The property is in the affluent Greens Farms enclave overlooking Long Island Sound.