LONDON - JAN 20: The world's most expensive residential apartment penthouse sold in London, on January 20, 2011 for over 135 million pounds.  After the build-out the cost will be 200 million pounds.
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LONDON - JAN 20: The world's most expensive residential apartment penthouse sold in London, on January 20, 2011 for over 135 million pounds. After the build-out the cost will be 200 million pounds.