19 Years of Real Estate Experience. Specializing in Investments, 1031 Exchanges, Buyers Agent, Sellers Agent. Hamptons and NYC Mark Langowski has been an active real estate investor since 2003. Mark has personally bought, sold, flipped and managed millions of dollars worth of residential properties. During this time, Mark gained first hand experience in the Manhattan and Hamptons markets. Mark now spends his time helping others buy their dream home, find the perfect investment property, sell their home or find a summer rental. Mark will be with you every step of the way during this exciting, but often overwhelming process. Mark is a licensed real estate agent in the state of New York and is a Real Estate Salesperson for Nest Seekers International.