Shapleigh's King Nitro .410

I recently acquired a Shapleigh's King Nitro .410 single shot, Model 94B. It has a plastic or nylon wood grain forearm and stock. The butt plate is is a yellowed white plastic. The Bluebook only has a cross reference to a Savage Model 15 for this shotgun. I know Shapleigh's was a hardware chain around St. Louis and sold out around 1960. I cannot find any prices or values on this shotgun anywhere and was wondering if anyone would have an idea as to where I can search next or know of a collector of such forearms I could contact. The shotgun is in fair condition. It is tight and operable. Thanks in advance...Tony

Tony Smith