Cafepress: Lots of items with my art and the art of Andrew Barr. T-shirts seem to be the most popular.
Etsy: I sell prints here along with a grab bag of buttons and my art book. Each purchase comes with a one of a kind, freshly drawn and painted art card.
DevaintArt: I also sell prints here but they are print on demand and the artwork comes directly from DeviantArt. There might be something here for sale that I'm not offering in my Etsy store.
Lulu: I sell my art book here as print on demand. But you don't get an art card from me if you go through Lulu.
Sigs and Tubes: I sell certain images for tubing and signatures here.