Today’s the day when buying begins at the Summer Exhibition Preview party.   Everyone is going round clutching their little red books and checking out the prices.   I am doing it myself.   There’s a nice Michael Craig Martin print of an iPhone.   Only £960.   I really like the Ackroyd and Harvey photograph of their grass portrait (they work in grass).   It’s £5,000.   Too much for me.   Frank Bowling has got some great work in the exhibition, but it’s way beyond my means.   I hope someone will buy the Sean Scully, the price of which is on application.   There’s a really good set of prints by Stephen Chambers narrating the The Life and Loves of Casanova.   £6,000.   Part of the point of the exhibition is that there’s something for everyone.