The beautiful 1906 building, which has been on the market for some time, was included in a New York Times report on threatened historic post offices around the country:

... is one of about 200 post offices around the country, dozens of them architecturally distinctive buildings, that the Postal Service has indicated it may choose to sell in coming years because of its financial problems.
So as the Postal Service tries to shrink, it is often finding itself in battle with groups trying to prevent what the National Trust for Historic Preservation last year labeled one of the most significant threats to the country’s architectural heritage.“Unless the U.S. Postal Service establishes a clear, consistent process that follows federal preservation law when considering disposal of these buildings, a significant part of the nation’s architectural heritage will be at risk,” the trust said in a citation that placed historic post offices on its most endangered list. ...There are some 31,000 retail postal offices in the country, most of them leased. But roughly a quarter are government-owned and as many as 1,100 were built in the 1930s, when the government hired architects to design civic buildings.

