Source: US. Bureau of the Census
Data appearing as a "0" does not actually represent "0" units sold. Do to rounding issues "0" refers to less than 500 units sold.
US. Bureau of the Census, New Houses Sold by Sales Price Between $500,000 and $749,999 in West Census Region [NHSSPW50T74], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/NHSSPW50T74, December 2, 2016.