In Germany, artist Wolf-Gunter Voight holds a twice weekly auction of his Pad Paintings. In each auction he makes one of his iPad paintings available for easy purchase via a Fine Art Auction App on his Blogspot blog. In the screenshot above you will notice that the information and instructions are in both German and English.
Auction apps is a big topic and I am just beginning to explore the many options out there which will take some time. Live Auctioneers offers a iPhone auction app for selling art, antiques and collectables. Get an account free.
Caspio has an online auction and Facebook integration. They offer a two-week free trial. Read this successful case study.