Gwen M. Engelhard and Cynthia F. Cooper bought the condo Unit #14CD at 55 E. End Ave. in Yorkville from Duane Sachs and Kathryn Lancioni for $1.7 million on Sept. 4.

The 15-story development at 55 E. End Ave. was built in 1951.

Dr. Gwen Engelhard practices general dentistry in New York City. She graduated from the New York University College of Dentistry.

According to BlockShopper.com, there were 197 condo sales in Yorkville in 2008, with a median sales price of $636,000.

Address: 55 East End Avenue, Unit: 14cd
Buyer(s): Engelhard, Gwen M, Cooper and Cynthia F
Seller(s): Sachs, Duane, Lancioni and Kathryn
Sale date: Sep. 4, 2009