The billionaire is in talks to sell his Arcadia Group, the owner of Topshop, to Chinese textile giant Shandong Ruyi, according to the Sunday Times. A sale would be expensive for Green because the conglomerate has big pension liabilities relative to its potential value. But the alternative -- heavy investment across his businesses -- will be just as costly and unpalatable. Topshop had an enterprise value of 2 billion pounds ($2.8 billion) in 2012, when Green sold a 25 percent stake in the chain to U.S. private equity group Leonard Green & Partners.