If you're interested in other forms, like chibis, badges, etc, please note me. :)
About ref sheets:
Yes. Their price depend on amount of pictures of character, there's also option of adding "mini sketches".
About prices. Base price in semi real is 30$. It contains fullbody with colors and shadows, color pallette and texture background. Second view is 25$, third 20$. Bust- 10$. About sketchy miniwievs, fullbodies 5$, Bust 3$.
On comic style. Base price- 20$. It contains full body with colors and shadows, color pallete and texture background. Second view is 15$, third 10$. Bust- 7$. About sketchy miniviews, fullbodies 3$, bust 1$.