Tinyshowcase.com is both a blog and an online store. They sell limited editions of small format prints and other diminutive art related items such as bookplates and t-shirts. The goal of having small sized art is to be able to sell cheap and allow many art lovers who couldn’t usually afford nice non-mainstream art to indulge in their prints. The art is by many different artists and the series are usually very small runs, like 20 items.
What is different about their business model is that each artist picks up a charity and the charity as well as the amount being given to it are set when the items are put for sales. So you can feel good about yourself AND have pretty stuff.