Sales declined in the Riverdale section of the Bronx, including Fieldston, Hudson Hill, North Riverdale and Spuyten Duyvil, limited by available inventory. The shortage of sales was more pronounced at the upper end of the market skewing price trend indicators lower. The median sales price was $285,000, down 1.6% from the same period last year. The decline in average sales price was more pronounced due to less activity at the top of the market, declining 14.6% to $394,711 over the same period. By property type as compared to the prior year quarter: co-op median sales price rose 5.8% to $250,000; condo median sales price fell 27.1% as the mix shifted with fewer sales; 1-3 family median sales price rose 13.6% to $906,000. Listing inventory declined 24.5% to…