How much is a delphian double barrel 12 gauge shot gun?

Delphian Arms Co shotguns that were distributed H&D Folsom Sporting Goods were either manufactured by Crescent Arms Co (Norwich, CN, 1892-1931) or imported from Belgium. The same name was also used by Supplee-Biddle Hardware on Fulton Model shotguns manufactured by Hunter Arms Co. (Fulton, NY, 1890-1945). The value of any gun is based on the exact make, model and condition. Most of these are middling quality, and sell for $150 or so.