Daniel Ustian and Ramona Ustian bought a three-bedroom, 2.5-bath condo at 195 N. Harbor Drive in Streeterville from Dr. Anthony W. Gargiulo for $815,000 on May 25.

Gargiulo paid $323,500 for the property in June 1995. The 1,600-square-foot condo, Unit #3002, is part of The Park Shore condominium, which was built in 2000 and is located in New Eastside subdivision.

Mr. Ustian is chairman, president and chief executive officer of Navistar International Corporation. He has led Navistar on a steady path to become a $15 billion company by delivering great products, competitive cost structures and profitable growth.

He holds a bachelor's degree in business administration from DePaul University and was elected a member of the board of trustees.

Dr. Gargiulo practices periodontal dentistry at Chicago Periodontal and has held teaching positions at Loyola University. He has been a contributing author to a number of periodontal texts and has published a number of research papers and lectured worldwide.

He earned his periodontal graduate degree from Loyola University.

According to BlockShopper.com, there have been 160 condo sales in Streeterville during the past 12 months, with a median sales price of $410,000.