CHICAGO — Grubb & Ellis has brokered the purchase of a 21,800-square-foot office building, located at 557 W. Randolph St. in Chicago, for $2 million. The property was acquired by Actors’ Equity Association (AEA), which is expanding from its previous location at 125 S. Clark St. in Chicago. The actors’ union will initially occupy two of the building’s four stories beginning in the second quarter of 2010 and will lease out the remaining space. Mark Stables of Grubb & Ellis negotiated the transaction. Stephen DiPaola of AEA provided in-house representation. The building located at 557 West Randolph was constructed in 1855 and is one of only two buildings in the area to survive the Great Chicago Fire of 1871.