Long Island housing market conditions continued to tighten with lower inventory, rising sales and rising prices. Median sales price rose 4.2% to $375,000 from the prior year quarter. This was the highest second quarterly result since the financial crisis began. Average sales price followed the same pattern, rising 5.9% to $470,369 over the same period. The trends were similar by county as well. The median sales price for Nassau County increased 5.8% to $439,000 from the prior year quarter. The median sales price for Suffolk County, excluding the Hamptons and North Fork, rose 5.8% to $317,500 over the same period…