Greysheet variety questions?

Why doesn't the greysheet expand on some of the key varities of some of the modern series (Jefferson's 1939 ddr, 1942-d/horz d, 1949-s/d, etc.) like the red book does? Maybe if dealers had something to go by, it would help on some of these later varities that are very popular with collectors and they could get more business. Your thoughts on this issue please!
Big Tony from Texas! Cherrypicking fool!!!!!!
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Comments
<< <i>there should be a quarterly publication on varieties. i think theres more interest in it then what meets the eye >>
I agree there's more demand for variety pricing information, but I doubt there's enough to justify the labor, printing and mailing of such a publication.