Online art market for buying and selling my work

I have begun what I hope will be a sustained and systematic effort to sell some of my current artwork online: allenbukoff.com/artmarket. I am trying to create a public market place that will allow me to sell my art objects, track who buys them, and monitor any changes in the monetary value of this work. Someone might, for example, buy one of my art objects and then turn around and sell it to someone else using my online market. The first public sale on my new market place--5 cigar boxes of Christmas tree pieces--was held on June 9th. I announced the sale simultaneously via email, on Fluxlist Blog, and through my Facebook and Twitter accounts. All five boxes sold in less than 30 minutes!