Art on a Postcard returns for its fifth year this month, remixing the lucky dip formula for the art world—all in aid of The Hepatitis C Trust. Artists emerging and established alike have contributed a unique piece in a postcard-sized format to be auctioned. All of the work remains anonymous until after the sale (13-16 November), meaning that pieces by big names like Marina Abramović could be snapped up for a song. Bidding is open now.
