Faso is not the cheapest option here, but it has a few aces up it's sleeves that other builders don't. Your artwork will get in front of their large audience of collectors and art enthusiasts. (80.000+ subscribers) They also help you promote your art with the help of your own newsletter.
All plans come with a free domain name (if you already own one you can transfer it and you won't have to pay a renewal fee afterwards). You can easily sell art through the site, commission free. Also, they will transfer up to 50 pictures from your old site for free, with more available for a fee.
Now for the minuses, the biggest one being that Faso seems like the most stingy builder on the list. For $8/month you get a mere 25 images and get this you have to pay 35 cents per month per extra image. Also on this plan, you are allowed a maximum of 50 subscribers (total) to your email newsletter.
That said, the good stuff is available for the higher plans, $25 and $35 per month, which will allow you to upload unlimited images. You'll even have unlimited newsletter subscribers (but up to 15.000 emails per month, not sure how that would work). A 10% discount is available for yearly plans, which should soften the blow a bit.
Event and workshop listings plus a blog are other tools that you can use to get your name out there. Give it a try now, with the free 30 days trial, no credit card needed.