they're cheap because the example sketch looks wonky
better examples of my sketches http://d.facdn.net/art/thegrandhigh....._fensketch.png (nsfw)
http://d.facdn.net/art/thegrandhigh.....od_slaveme.png

$2 starting price for simple characters (like the character in the example picture) with min coloring, +$1 for complicated character type, ++$1 for difficult markings youw ant colored

+$4 to make it a lineart
+$2 on top of that for flat colors
+$3 on top of that for shading