A nice alternative to Etsy. It is a juried site so there are more high end items to buy. The site is very nice to look at and it has a great concept too. Choose from any of the "markets" and browse away.

We have our Melted Bottle Cheese Plates on this site and it seems like a really great showcase for artists. I find it to be a cut above some of the other sites I have seen. Plus it has lots of eco friendly items.
Mitchell Glassworks

This is a new online market for artists to promote and sell their work. It's still growing but shows promise, check it out!