Previews vs. First Appearance - Introducing RULE 31. 1 1

[the blob]

On 5/20/2019 at 11:12 AM, valiantman said:

There is a scenario where an argument can be made that previews are "RARER" than first appearances, so the formula should be adjusted.

However, in the More Fun #31 vs. Action Comics #1 situation described above, More Fun #31 is already 0.1463 of Action #1 counts on the CGC census (6 universal copies vs. 41 universal copies of Action #1).

So, we can make a formula for the Rule 31 (More Fun 31 Rule) appropriate value of a preview book (which is the same grade as a first appearance book):

P = Preview book/ad/article

F = First appearance book

P$ = Rule 31 appropriate value for preview book

Pc = Preview book CGC census count (universal + signature)

F$ = current value for first appearance book

Fc = First appearance book CGC census count (universal + signature)

 

RULE 31 FORMULA:

P$ = F$ / 439 * Fc / Pc * 0.1463

 

Example:

P = More Fun #31

F = Action Comics #1

P$ = what we want to find out

Pc = 6

F$ = $498,750 for CGC 3.0

Fc = 41

P$ = F$ / 439 * Fc / Pc * 0.1463

P$ = $498,750 / 439 * 41 / 6  * 0.1463 = $1,136

Therefore, More Fun #31 CGC 3.0 should be worth about $1,136 according to Rule 31 (and it is).

I'm not so sure more fun is less common than action 1. There are a couple of copies of 28 up now. I just think there are raw copies out there.