Coldwell Banker Commercial Rosner & Associates sold 991 Main St. in Holbrook, N.Y. for $3 million. The 15,000 s/f office building is located in central Suffolk County, Long Island. Anchored by a Washington Mutual Bank branch, the building's largest office tenant is Medcomp Systems, a software supplier to the medical industry. The seller was RJT Properties, Inc. Built in 1987, the two-story masonry office building was recently renovated, and is located minutes south of exit 61 on the Long Island Expressway. The building, which sits on 1.5 acres, was 75% occupied at the time of sale. The buyer was Harnet Holdings Corporation. Andy Dorman, senior director at CBCR&A, was the sole broker. "We had a lot of interest in this property," said Dorman. "The bank branch was a key component. It is a very busy branch, so there is a strong likelihood that it will stay leased for many years." Dorman and Lee Rosner, managing director of CBCR&A were also the sole brokers in the July sale of a 39,000 s/f special purpose property on 5 acres in Sayville, N.Y. The sale price was $3 million. The property is located at 138 Greeley Ave. The seller was Glory Zone Ministries. Originally built in 1893, and prior to its current conversion, the property's improvements had a long history of industrial uses. The buyer was Gospel Community Church.