You can find the details in my tumblr post here.
The gist of it is:
Sketch + optional flat colors: $20
Half-body portrait: $40
Painted full-size: starting at $70 (depending on background, scene complexity, etc)
Unfortunately, I can't take payment in DA points as I can't eat points (I can't eat money either but I can buy food with it XD). Prices are in USD and payment will be through PayPal. If this is a problem for you, we can try to work something else out. : )
If you're interested, send an email to firstname.lastname@example.org or send me a note here. Slots are first come first serve!