Rising price trends in concert with inconsistent sales patterns characterized the Miami mainland housing market in the first quarter. Median sales price edged 0.6% higher to $311,950 from the prior year quarter, but market pricing remained softer at the top. The luxury market, comprised of the top 10% of all sales, showed mixed results by property type. The luxury condo threshold began at $580,000, and the median sales price declined 6.9% to $780,000 from the year-ago quarter. The…