The Hamptons housing market took a step back this quarter with weaker sales and price trends but with less inventory. The pattern of fewer overall sales revealed a “soft middle” and a greater market share of sales both below $1 million and above $5 million. While there were 601 overall sales, down 12.8% from the year ago, the 49 sales at or above $5 million were the third highest total in more than fourteen years of record-keeping. The market share…