Existing Home Sales Plummet By Young Research - August 24, 2010 Existing home sales plummeted 27% in July to a new 15-year low. Existing home sales have now entered double-dip territory. At the current rate of sales, there is a surplus of more than 12 months of existing home supply—a 28 year high. Share this:EmailTwitterFacebook RELATED ARTICLESMORE FROM AUTHOR Top 10 U.S. Cities Where Home Prices Are Dropping Fastest U.S. Housing Market: Sales Up, Inventory Rising The Growing Shortage of Small Warehouses