The Certified Guaranty Company (CGC) grades comic books from a scale of 0.5 (the lowest) to 10.0 (the highest). The Comic Book Certification Service (CBCS) grades comic books similarly, except that it can assign a grade of 0.1 or 0.3 to incomplete copies (interiors missing covers or covers missing interiors).
An Action Comics #1 CGC 9.0 was sold in 2011 for US$ 2,161,000; another CGC 9.0 was sold in 2014 for US$ 3,207,852; and a CGC 8.5 was sold in 2021 for US$ 3,250,000.
A CBCS 0.3 was sold in 2016 for US$ 65,725 (including the Buyer’s Premium). Considering that the Overstreet 2023 GD 2.0 value is US$ 347,000, I didn’t expect a CGC 0.5 to be sold for more than US$ 100,000.
So I was quite surprised when a CGC 0.5 was sold last September 14, 2023 for US$ 408,000 (US$ 340,000 plus the 20% BP). (The image above is an edited version of the one in the link I provided.)
Joel Reyes Noche 