A newly listed Boca Raton estate is asking $125 million — and the marina alone helps explain the price. Set on 2.19 acres at 600 NE 5th Avenue, the newly completed waterfront residence offers more than 18,000 square feet of living space, nine bedrooms between the main house and guest house, and approximately 220 feet of frontage along a protected no-wake section of the Intracoastal. Most notably,...