Since I gained a lot of watchers lately, I had to make some changes here.
All the prices aren't firm and we can always bargain, but I should at least put some defaults:
SHADED SKETCH (no background): 2$ / 1 TF2 Key
QUICK DRAWING (Simple background): 5$
FULL DRAWING 10$
+2$ for each additional character on drawing
+1$ for complicated background