One of our readers has pointed us to a great idea for an exhibition. Organised by Alanna Heiss, at PS1 in New York, Not for Sale is only showing work that, for a variety of reasons, artists have decided not sell at any price. Artists include: Janine Antoni, John Baldessari, Cecily Brown, Chris Burden, Christo, Jasper Johns, Jeff Koons, Louise Lawler, Dennis Oppenheim, Richard Prince, Ed Ruscha, Julian Schnabel, Richard Tuttle, John Wesley, and Jackie Winsor. Alanna Heiss notes, “Not everyone I called is in the show. Some artists simply could not find works that they would not sell.” For details and dates go here.