It is a US Model of 1833 Dragoon saber Enlisted men's version I believe.... I looked a bit and being just a plain non engraved blade with no provenance to it's original owner, I found a couple similar in the 4-500 dollar range... but those were made by Ames, and I'm not sure if there will be a major price difference for a Horstmann blade..
It's definitely a nice sword though, I'd be happy with it