Four year-old Realty Collective, a Brooklyn brokerage, has purchased Frank P. Manzione Real Estate, the veteran Red Hook/Carroll Gardens firm. Realty Collective will take over Manzione’s Columbia Street offices, though Manzione plans to stay on with his new colleague, 28-year-old founder Victoria Hagman, a former music industry booker who seeks out creative real estate agents who aren’t “creepy” and promises to walk her clients’ dogs. The merger tripled Realty Collective’s listings. “It’s like we bought the Yankees,” agent Tina Fallon said of the move. [Brownstoner] and [Brooklyn Based]