Complex sentence: The newly reconstituted Tishman Speyer Properties bought the building for $518 million in 2000 (about $million real value), and about the same time Tishman also bought Rockefeller Center.
Split into simpler sentences: The newly reconstituted Tishman Speyer Properties bought the building for $518 million in 2000 (about $million real value). At about the same time Tishman also bought Rockefeller Center.