The Black Broken Sword

[LEVEL ONE]

One day I saw someone in Balefort Castle wielding a black broken sword. And it was the first time I noticed this weapon (on a non-npc character) and this could be for one of two reasons: either the weapon is incredibly rare, or it is junk that nobody equips. I am aware of the possibility that this is a completely silly question, and my guess is that it is a very common drop somewhere in those higher level dungeons which I hear people talk about. But I have to make sure.

Picture of a dessert marauder with a black broken sword:


So, is it rare?
What's the weapons name?
What's the weapons price?
What level version(s) does it come in?

Thank you.