Rising sales and falling supply are a developing pattern in the overall market. One of the byproducts of the trend is the recent upward push in average price per square foot, given the 10.9% drop in average sales size. There were 56 condo and single-family sales in the quarter, 3.7% more than the same period last year, and the fourth straight quarter with year over year increases. Listing inventory fell 17.9% to 288, the second consecutive quarter with a year…