For 50+ years at Derzon Coins we have taken pride in providing world-class customer service. We are able to efficiently work with our customers while maintaining privacy and competitive pricing. We are Wisconsin s most respected authority in rare coins and one of the top dealers in the U.S., offering certified graded coins through the Professional Coin Grading Service (PCGS), the Numismatic Guaranty Corporation (NGC) and the American Numismatic Association Certification Service (ANACS) to give confidence and security to those buying high value items.