The pace of the Hamptons housing market slowed in the final quarter of 2018 as prices stabilized. There were 360 sales in the fourth quarter, down 34.8% year over year to the lowest fourth quarter total in a decade. The year over year rate of sales declines expanded each consecutive quarter in 2018. With the cooling sales, listing inventory expanded. There were 2,197 listings at the end of the quarter, up 81.9% from the year-ago quarter…