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.