Grunberg Schloss, Inc., has been buying, selling and trading coins, gold and silver to customers in Ponderay, ID and the surrounding areas for over 25 years. We specialize in coins, bullion, prospecting and metal detecting supplies and preparedness. Grunberg Schloss, Inc., is a family owned and operated business with personal service. We go to many trade and coin shows, so if there is a special coin or other piece you are looking for, let us know and we'll search for it. A Prospecting Supply Catalog available. As we expand the inventory, if there is something you would like us to carry or order, we will do what we can.