PHOENIX — ViaWest Group has purchased three buildings at Blackhawk Corporate Center in Phoenix for $34.2 million. The buildings are located at 20401 N. 29th Ave., 2902 and 3010 W. Agua Fria Freeway. The complex was built in 1997 and 1998. Darren Tappen and Peter Beauchamp of Kidder Mathews and Ryan Timpani of Colliers International, the project’s leasing agent, represented both parties in the transaction. The seller was Cohen Equities.