NEW YORK CITY — GFI Realty Services has arranged the sale of 1424 Avenue J, a mixed-use retail and multifamily property in the Midwood section of Brooklyn, for $3.6 million. Di Fara Pizza occupies the property. GFI Realty’s Shulem Paneth and Eli Matyas represented the seller, a foreign investor, in the transaction. GFI’s Sylvia Spielman represented the buyer, a local investor with several properties in the area. The four-story building is comprised of six apartments and four stores, all of which are currently occupied.