As of 2010, the highest price ever paid for a downtown office building in Chicago was 300 N LaSalle for $655m ($503/sqft).

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On a per-square-foot basis, the sale shatters the previous record price of $403 per foot set in 2008, when an affiliate of Hines acquired 1 N. Wacker Drive for $540 million, according to real estate data provider CoStar Group Inc.