Get to Know the Certified Collectibles Group Since 1987, we have graded more than 100 million coins, banknotes, comics, cards, stamps and more. Learn more
CGC-graded Superman #1 Realizes $9.12 Million, Shatters Record After being found in a California attic, this comic was certified by CGC and then made history. LEARN MORE
NGC-certified Brasher Doubloon Realizes a Record $9.36 Million! The Partrick sale set records, including the highest price for an NGC-certified coin at auction. Learn more
It's Official: CGC Is the Hobby's Fastest-growing Card Grading Service CGC has experienced record growth in card grading in 2025. Learn more
Group of Seven PMG-certified Zanzibar Notes Realizes Over $850,000 The Spink sale included PMG-graded examples of all seven denominations of the rare Zanzibar Rupee. Learn more