BANGOR, Maine — The block of downtown buildings on Exchange Street that recently went up for sale after years of underuse already has a likely developer after less than a month on the market.

“Sale pending” signs were posted in the windows of some of the buildings on Wednesday.

John Bonadio of Maine Commercial Realty, a broker on the sale, said he’s working with a local developer to close the deal. Details aren’t being disclosed, but the asking price was $1.95 million for six buildings lining one side of Exchange Street.

Interest in the properties has been high. Bonadio and Pete Laney, another broker on the sale, led three prospective buyers on tours through the six buildings last Thursday alone. In all, six potential developers looked at the site, including several from the southern part of the state, Bonadio said.

“I believe we have a good match for the project,” Bonadio said. “The prospective buyer is a very talented and experienced local developer.”

Attempts to confirm who that developer is on Thursday weren’t successful, and Bonadio said the likely buyer has asked to not be identified until later in the purchasing process. Bonadio said he’s been sharing floor plans and other information the buyer would need in order to craft renovation plans with engineers and contractors. He also has shared contact information of several businesspeople who are interested in leasing portions of the buildings.

The buildings have been largely empty for more than a decade, and there’s a convoluted history behind that. In 2004, Bangor Hydro sold three of the buildings to PROTEA Behavioral Health Services, which was then a rapidly expanding organization that already owned the other properties on the block. Two years later, PROTEA was acquired by Sweetser, the state’s largest private nonprofit mental health organization.

Around the same time, the entire block was purchased by a New Hampshire-based LLC. In 2007, Sweetser shuttered the Bangor branch after it lost a significant chunk of its state funding. Sweetser had only recently entered the 10-year lease on the property, and it continued paying rent, and maintained some office space, but occupied less than 30 percent of the property, according to Keystone.

That lease expired in June, opening the option to redevelop or sell the buildings. The LLC opted to sell.

The brokers and the prospective buyer haven’t finalized the sale, but are working toward that goal.

“We continue to receive calls from interested parties and will keep all contact information on file in case the sale is not consummated,” Bonadio said.

Follow Nick McCrea on Twitter at @nmccrea213.