NEW YORK CITY — GFI Realty Services has completed the $25.5 million sale of 201 Linden Blvd. and 221 Linden Blvd. in Brooklyn, New York City. The two six-story buildings contain a total of 352,540 square feet and approximately 300 units. The units range from two-, three- and four-bedrooms. Erik Yankelovich of GFI represented the buyer, an undisclosed New York-based investor. The seller was undisclosed.