I just read the following thing. Does anyone know if this is true?:
All American #16 While not possessing the mainstream cachet of some of the other books in this list, this, the first appearance of Green Lantern, has gained considerable attention in the past few months. A notoriously difficult book to find in high grade, the best known copy (the Edgar Church/Mile High copy) was recently graded by the Comics Guaranty Corporation at Near Mint (9.4 out of 10 in their numerical grading scale.) That by itself was exciting to many in the hobby as books that significant rarely come up for public appraisal like that. Beyond even that, it was learned that it was graded by its owner, long time dealer and super collector John Verzyl, in order to facilitate a sale. As of this writing all rumors point to a sale price of 1.1 million dollars, a figure that, if verified, would triple the previous record price paid for a single comic book.
http://itsalljustcomics.com/collecting-superhero-comic-books/