Photo by districtross78 First Potomac Realty Trust announced plans earlier this week to buy the Greyhound bus terminal in Northeast. The purchase of the raw 712,000 square feet property, to go for $46.75 million, is said to be one of the last major development sites to be bought up in the NoMa (North of Massachusetts) neighborhood. Although the Greyhound bus station has stood in its current location since 1983, the company plans to move…