Sales of Hamptons properties pressed higher as prices fell short of prior year levels. Median sales price slipped 1.3% to $908,500 and average sales price declined 9.3% to $1,539,646 respectively from the prior year quarter. However, median sales price and average sales price year-to-date are 4.7% and 5.1% above the same period last year respectively. The pace of price growth is beginning to cool with the modest expansion of inventory that is being seen across most markets in the region. Listing inventory increased 4.7% to 1,647 from the same period last year…