Raphael Muse

This drawing Head of a Muse by Raphael was part of his preparation for a series of four frescoes that he painted in the Vatican between 1508 and 1511, commissioned by Pope Julius II. It's up for grabs in Christie's Old Masters and 19th Century Art sale in London on 8 December, estimated value between £12m and £16m. Take Coxsoft's advice: flog your Lamborghini, your yacht and your town house and see if you can outbid the Russian Mafia. This is a world treasure which really shouldn't be allowed to fall into private hands.