World's 10 RAREST Comic Books, According to CGC Census

What are the rarest comic books in the hobby? Using the CGC Census and the Overstreet Price Guide as resources, I provide a compelling list of the Top 10 RAREST comic books. Even books considered rare like Action Comics #1 (75 copies on cgc census) do not make this exclusive club. And, X-Men #1. Forget about it. Not even close to being rare. For those interested in reading more about the methodology, keep scrolling down.

---IN THIS VIDEO---
0:24 | A quick note about methodology
1:19 | Rarest Comic Books, 10 - 6
2:47 | X-Men 1, why it's NOT rare
3:27 | Rarest Comic Books, 5 - 3
5:40 | Rarest Comic Books, 2 - 1

---Acknowledgements---
The majority of images and much of the descriptions about these rare books come from Heritage Auctions (HA.com)

Image of Fantastic Comics 3 from ComicConnect.

Green Giant can from Amazon image.

---Methodology---
For this video, comics were eligible for inclusion in the Top 10 Rarest if they...
A. Were listed as one of the top valuable comic books by CGC in the categories/ages of gold, silver, bronze, copper, and modern: 220 books total. (Rationale: Many comic books have low census counts because they are not valuable, and thus collectors have less incentive to have them graded.
B. Can be graded by CGC. (A handful of the 220 cannot due to irregular size and/or because CGC can't authenticate them.)

Additionally, Overstreet starts the Golden Age in the mid 1930s; many others start the period in 1938. I went with the Overstreet classification.