Hi,
Give it a bit of a clean on one of the broken edges and see what colour the material is. That should tell you whether it is bronze or spelter. If it is spelter then it will have virtually no value. If it is bronze then it could still have some value, other than the scrap value, and the value would depend upon the actual artist , scarcity of piece and so on.
When you say 'sword' I imagine that you mean a full size one, and not from the statue?