Sketches - $15
Flat color - $25
Full color with shading - $35
Prices can be higher or lower depending on number of characters, complexity of the background, or just the overall complexity of the piece.
It's not likely that I'll lower the price of sketches for even very simple character designs as anything less just wouldn't be worth the effort.
I hope this helps anyone who might be interested in a commission.
Take care pony peeps!