The Royal Academy’s annual Secrets sale offers cards by famous artists at a low price. The identity of the artist remains unknown until each card is bought and the signature is revealed on the back. One fan camped for two weeks to lead the queue for the sale, which helps students with grants and bursaries. Illustrator Quentin Blake and Tracey Emin were among the artists to donate a record 2,700 cards, each sold for £35.”