In May, I'll be attending the WTFur convention for the third time, and I intend on getting a spot in the Artist's Alley to take commissions. I don't have a spot yet (it's not specified on the site how to ask for one...), but if I do get one, I'm wondering what would be a fair price for my stuff. I've been told my intended prices are way too cheap, so I thought I'd get people's opinion on the matter; should I keep these prices, or bump them up some? Or make them cheaper (what)?

(Note: this does not mean I'll be taking online commissions, so please don't ask)

Doodle page (busts & toony full-body) - 3$
Badges (size pending):
Sketch - 2$
Ink - 5$
Colour - 8$

Full-body:
Sketch - 4$ (+2$ for background)
Ink - 6$ (+4$ for background)
Colour - 10$ (+6$ for background)
+3$/character