eBay just announced that Action Comics #1, considered the “Holy Grail” of comic books, is going to be auctioned off on the site next month.

According to the announcement, there are believed to only be about 50 unrestored original copies of the issue that introduced the world to Superman. Dealer Darren Adams has one of them (apparently the finest known copy), and is about to generate a ton of money from it. He’ll be putting it up for auction on eBay from August 14-24.

The Certified Guaranty Company (CGC) gave Adams’ copy a 9.0 grade, which is the highest its given to any copy of the issue. One other copy got the same grade, and sold for $2,161,000 in 2011. According to eBay, that one had “cream to off-white pages,” while Adams’ has “white pages and is in pristine condition”.

It’s pretty amazing that it could even be in such condition, considering that it was released in 1938, when nobody could have possibly anticipated its potential value.

“The quality and preservation of this Action #1 is astounding,” said Paul Litch, CGC’s Primary Grader. “The book looks and feels like it just came off the newsstand. It is supple, the colors are deep and rich and the quality of the white pages is amazing for a comic that is 76 years old.”

“This is an extraordinary opportunity to acquire the most valuable comic book in existence and we look forward to sharing a piece of pop culture history with the global eBay community of 149 million buyers,” said eBay’s Gene Cook.

An undisclosed portion of the proceeds will go to the Christopher & Dana Reeve Foundation.

Image via eBay