Nowadays, even tear-down properties are no bargain. An unidentified homebuyer has paid what brokers are calling a city of Fort Lauderdale record of $70 million to acquire a prime waterfront estate at the intersection of the New River and Intracoastal Waterway. A sprawling estate home is shown at 5 Harborage Isle in Fort Lauderdale at the intersection of the Intracoastal and the New River.