Ballantyne Housing Market Update/Video: April 2019. Average and median Ballantyne home sale prices saw a slight decrease in April. Despite an increase in days on market, homes are still selling in under two months on average. Pending sales were up 18.1% in April. The months supply of homes at 1.9 months and an 8.8% drop in new listings keeps the Ballantyne/28277 zip code housing market a seller’s market.