been running around this issue for a while, not really putting much effort into a price list or anything. :P
(plus not knowing how to do the commissions info tab here on FA)

Traditional art: starting at $5 for sketches, $10 and up for colored using colored pencils. Prices increase on difficulty.
examples:
http://www.furaffinity.net/view/20750257/
http://www.furaffinity.net/view/20735779/
http://www.furaffinity.net/view/20802128/
http://www.furaffinity.net/view/20407841/

Digital art: Still learning how to do digital. barely started using my tablet and don't really know what im doing yet, heh.
Starting at $10, depending on complexity.
http://www.furaffinity.net/view/21477914/ (done on a base)

3D artwork. Making a new character model would cost anywhere between $10-$25 depending on complexity. (no guarantee if I will be able to make your character or not.)
Pictures/scenes with models I already have would start at $10.
http://www.furaffinity.net/view/21677460/
http://www.furaffinity.net/view/21623342/
http://www.furaffinity.net/view/21579996/

Manips, either 2D or 3D, You provide the picture you want manipped, and what you want done to it. Starting at $5 depending on complexity.
http://www.furaffinity.net/view/21702312/
http://www.furaffinity.net/view/21702647/
http://www.furaffinity.net/view/21702259/