The median sales price for homes in Yaphank NY for Oct 11 to Dec 11 was $243,800 based on 1 home sales. Compared to the same period one year ago, the median home sales price decreased 20.7%, or $63,700, and the number of home sales decreased 66.7%. There are currently 88 resale and new homes in Yaphank on Trulia, including 1 open house, as well as 1 home in the pre-foreclosure, auction, or bank-owned stages of the foreclosure process. The average listing price for homes for sale in Yaphank NY was $288,655 for the week ending May 09, which represents a decrease of 0.3%, or $830, compared to the prior week.