A man walks past a golden Royal Mail post box in Westminster, central London, October 8, 2013. Britain is on track to sell shares in Royal Mail at the top of its range, two sources close to the deal said, valuing the postal service at more than $5 billion (3 billion pounds) on the final day that investors can put in orders. The post box is one of several that was painted golden to celebrate the London 2012 Olympic Games. REUTERS/Andrew Winning (BRITAIN - Tags: BUSINESS)