I draw full color sketches with shading and small details. It takes me about two hours to create a picture, though that doesn't really include the sketching process. I'm always willing to do sketches for free since I can usually whip one up in about 15-30 minutes. Plus it does help work out the little details for a full commission.
$20 fur a full color and shading commission per character (no discount for multiple character pictures)
+$10 for a background
$10 for full color shading for icons and badges (Digital only)