I think I've got one lying around the house somewhere. It doesn't have a scabbard and doesn't look as spiffy as yours. I don't think they are common, I'd pull out Thillmann's book to see what he has to say. I don't know about worth but I would put it at the high end of enlisted sabers. I have seen one in attic/relic condition listed as Confederate; I think mainly for the unstopped fuller.