ModernCoinMart owner John Maben entered the coin business full time in 1978. He is one of the world’s premier grading and authentication authorities. His more recent experience includes over eight years at NGC as Executive Vice President and a Grading Finalizer. John was a part-time grader at PCGS in the late 1980's and has personally bought and sold well in excess of $100,000,000. in rare coins. His experienced staff is ready to help you achieve your numismatic goals, whatever they might be.

With a staff that has over 75 years of experience, John Maben Rare Coins, Inc (JMRC) trading on eBay and online as ModernCoinMart, is one of the nation's leading dealers and one of Florida's largest full service numismatic firms. We are nationally known and recognized, and purchase U.S. coins and currency nationwide. We offer appraisals at your home or bank, if warranted.

John Maben Rare Coins, Inc is an NGC, PMG, & PCGS Authorized Dealer and a CCE/FACTS Exchange Member. John Maben is a Life Member of ANA, FUN, CSNS, GSNA, and a proud member of the prestigious and highly regarded Professional Numismatists Guild (PNG).