It can be bought from Jayes in Waukeen's Promenade during dusk and dawn, from the Adventurer's Mart in the same place, and from Magda's Tier Two store in the Black Pits. In Throne of Bhaal, it's sold at the Tankard Tree and by Karthis al-Hezzar.
|“|| Long Sword +2
A sword of standardized enchantment, powerful though it is. The great southern nations are said to have once had legions of their soldiers armed in such a fashion, a force that must have appeared truly imposing on the battlefield. The days of such extravagance are long past though.