http://www.furaffinity.net/user/flyingfire/ is planing on holding a Commissionary Black Sketchbook Idea.
It's a 8x8 inch softcover black paper book.
It has 8 pages, or 16 front to back pages.
The base for this would be around 250$'s for a beginning price, if all art within was Sketch level, with this as an example of what a Dark Sketch level is equal to for a 30$ equivalent for something that is normally charged 65$'s for.
This is the quality level she was thinking of for the sketches:
http://www.furaffinity.net/view/14926574/


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 Regular Pages
100 per page
800 per 8 pages
1600 per 16 pages
1800 per 18 pages

8 Black Paper Regular Pages
150 per page
1200 per 8 pages
2400 per 16 pages
2700 per 18 pages