$10 each for ones like these I've already made/am making.

$15 each for commissions, shipping included. These six are currently available, but will be making more.
pencil and ink on 2.5 x 3.5 bristol

There are more here:
http://foxbeast.deviantart.com/art/Artcards-batch1-562443549
http://www.furaffinity.net/view/18816500/color