The northwest region of Queens showed weaker sales and mixed price trends in the final quarter of 2018. The median sales price for the quarter was $778,481, down a nominal 0.2% while average sales price increased 6.3% to $874,594 respectively from the year-ago quarter. Higher priced 1-3 family sales skewed the average sales price higher despite their small market share. The number of sales declined 22.8% to 254 over the same period and was the third consecutive…