I have been seeing various people touting the virtues of Art Fire, including Sharon B. here. I finally set up my own Art Fire shop this morning.
I don't haven't added anything to my shop yet, but will shortly. They still have 614 out of 5,000 memberships going at $7 a month, after that it will be $20. There are no added fees or commissions. If you refer 10 people to join, your membership is free.
If you want your own membership register here. And tell them karrinh referred you.