Cornelia and Richard Thornburgh have sold their lakefront mansion on Everglades Island for $25.4 million, realizing a substantial profit. The property, originally listed for $24.9 million, underwent several price adjustments prior to the sale. The Thornburghs initially purchased the estate in 2014 for $9 million, and subsequently invested in extensive renovations to increase its value. This successful transaction follows a new purchase by the couple: a historic bungalow on Australian Avenue in Palm Beach, acquired for $8.12 million. The sale demonstrates continued strength in the Palm Beach luxury real estate market. The couple’s investment strategy proved highly profitable with the Everglades Island property. Their move to Australian Avenue signals a potential shift in lifestyle preference.