I have a Black Sketchbook Idea, and it kind of goes as thus:
https://www.furaffinity.net/journal/9440726/

I found these and they're 8x8 inches on all sides. Soft covered black paper sketchbooks.
It has 8 pages, or 16 front to back pages. 18 if you count the inner cover.
The base for this would be around 240$'s for a beginning price, if all art within is at Sketch level.
This as an example of what a Dark Sketch level is equal to for a 30$ equivalent for something I normally charge 65$'s for.:
https://www.furaffinity.net/gallery.....0/Black-Paper/
https://www.furaffinity.net/view/24268780/


8 Black Paper Sketch Pages
30 Per Page
240 Per 8 Pages
480 Per 16 Pages
540 Per 18 Pages

8 Black Paper Regular Pages
65 Per Page
520 Per 8 Pages
1040 Per 16 Pages
1170 Per 18 Pages

8 Black Paper Detail Pages
100 Per Page
800 Per 8 Pages
1600 Per 16 Pages
1800 Per 18 Pages

8 Black Paper Fullcolor Pages
150 Per Page
1200 Per 8 Pages
2400 Per 16 Pages
2700 Per 18 Pages

If your interested, let me know in the comments below. ♥