NGC, Numismatic Guarantee Corporation is a third-party grading service in Florida. NGC’s about us states: With an unparalleled commitment to accuracy, consistency, and integrity, Numismatic Guaranty Corporation® (NGC®) is the world’s largest and most trusted third-party grading service for coins, tokens and medals. Since 1987, (NGC) has graded more than 44 million coins, each one backed by the industry-leading NGC Guarantee.
We buy and sell many coins each year. We find them a very acceptable grading company and are able to buy and sell with ease.
You can view all the info about their first 30 years of a company right here.