I have put up a bunch of my personal designs on Redbubble.com for purchase.

What a neat site.  I download their template and put my work in it.  Then, I upload the saved design.

It is immediately available for purchase on tons of different products.  Tshirts, hoodies, kids clothing, and my favorites, stickers and Iphone cases.

Eventually I will be adding all of my greeting cards and wall art.

Check out my profile at http://www.redbubble.com/people/shinymetalthing