Anyone have a portrait website?

[Nomi]

I've been considering starting up a pet portrait website next summer, and have been starting to think about things like pricing, shipping, prints, ect. I was wondering if any DISers had a pet portrait, or human portrait, website? If so, what are your prices?
Do you determine your prices based of paper size, hours put into the drawing/painting or both?
How do you ship your commissions?
Also, what are the legalities of having a pet portrait website in Canada?

Just for reference, here are a few animal drawings I've done:
http://Phenomi.deviantart.com/art/Wolf-smile-47999747
http://Phenomi.deviantart.com/art/wagon-horse-42679397
http://Phenomi.deviantart.com/art/arabian-horse-37834499
http://Phenomi.deviantart.com/art/Bat-34408589 http://Phenomi.deviantart.com/art/Return-of-the-tiger-30803147

Also, what would be a reasonable price for a drawing of similar or better (some of those are quite old) that is, say, 16x20"?

Thank you all very much in advance!