With Long Island inventory refusing to budge from low levels, housing prices continued to edge higher. Median sales price for Nassau and Suffolk counties, excluding the Hamptons and North Fork, was $360,000, up 4.3% from the prior year quarter. Average sales price followed a similar pattern, rising 4.7% to $458,208. Price indicators for the luxury market, defined as the top 10% of all sales in the period, rose faster than the overall market…