Housing prices in Aspen moved higher as sales slipped and inventory expanded. Median sales price jumped 18.1% to $2,687,500 from the prior year quarter. Average sales price followed a similar pattern, rising 16.5% to $4,221,824 over the same period. A portion of the price growth was the change in average square footage of a sale, rising 6.8% to 3,124 from the year ago quarter…