I have two one ounce silver bullion coins that are marked "Oklahoma Federated Gold and Numismatics". They were purchased around 1990-1995. I have read that the company has since gone out of business. Would that make this coin any more valuable? I can post pictures later if anybody is interested. I know they're not worth mega bucks, but would there be a premium at all?
When I have questions like this, I go to completed auctions on Ebay. Chances are somebody has sold one or has one for sale.