Hm, that's hard for me to gauge as I've only gotten like 3 commissions prior, two of which were full color and shaded, one for $14, and one for $25. I'll have to get back to you within 12 hours.
I'll draw pretty much anything, just run it by me and I'll tell you if I'm uncomfortable with whatever it is. If it's lewd I might not post it, but I'll still draw most things. I've never really been asked for anything so bad I just couldn't draw it.
What would you say is a fair price for a single character colored and shaded? $15? $20? I like multiples of 5.