WASHINGTON  — Existing-home sales continued to improve in August and the national median price rose on a year-over-year basis for the sixth straight month, according to the National Association of Realtors®.

Total existing-home sales , which are completed transactions that include single-family homes, townhomes, condominiums and co-ops, rose 7.8 percent to a seasonally adjusted annual rate of 4.82 million in August from 4.47 million in July, and are 9.3 percent higher than the 4.41 million-unit level in August 2011.

Lawrence Yun , NAR chief economist, said favorable buying conditions get the credit. “The housing market is steadily recovering with consistent increases in both home sales and median prices. More buyers are taking advantage of excellent housing affordability conditions,” he said. “Inventories in many parts of the country are broadly balanced, favoring neither sellers nor buyers. However, the West and Florida markets are experiencing inventory shortages, which are placing pressure on prices.”