This is a good set of links and interpretations about rates for comic book artists.
Generally, the good graphic novels fetch $100 – $300 per page, although professionals who have been in the industry for a long time can command as much as three times that amount. In fact, one elite illustrator commanded as much as $1,000 a page (on a 22-page comic book)! Most of the popular titles that artists, like David Cassaday, work on are monthly issues, which end up providing him with a six-figure salary. The back-end royalties on merchandise, trade paperbacks and movie royalties are also generous.
