Sales of existing US homes rose in October to the highest level since February 2007 boosted by a tax credit for first-time buyers.

Purchases rose 10.1 percent to a 6.1 million annual rate from a 5.54 million pace in September, the National Association of Realtors said today. The median sales price fell 7.1 percent from October 2008, the smallest dip in more than a year.

Cheaper homes prompted by foreclosures and stimulus such as the $8,000 tax credit incentive boosted the market and sales were 23.5 percent above the 4.94 million-unit level in October 2008

Lawrence Yun, NAR chief economist said he was surprised at the size of the gain. “Many buyers have been rushing to beat the deadline for the first-time buyer tax credit that was scheduled to expire at the end of this month, and similarly robust sales may be occurring in November,” he said. “With such a sale spike, a measurable decline should be anticipated in December and early next year before another surge in spring and early summer.”

Now that the tax credit has been extended and expanded, potential buyers have until April 30 to have a contract in place. “There is still a large pent-up demand that can be tapped before the tax credit expires. Our recent consumer survey further shows that 13 percent of successful first-time buyers had a previous contract that was cancelled or fell through – there likely are many more buyers who were attempting to purchase but simply ran out of time,” Yun said.

Historically low interest rates also are boosting the market. “Mortgage interest rates last month were the third lowest on record dating back to 1971,” Yun said. According to federal mortgage financiers, Freddie Mac, the national average commitment rate for a 30-year, conventional, fixed-rate mortgage fell to 4.95 percent in October from 5.06 percent in September; the rate was 6.20 percent in October 2008. Last week, Freddie Mac reporter the 30-year rate dropped to 4.83 percent.

Total housing inventory at the end of October fell 3.7 percent to 3.57 million existing homes available for sale, which represents a 7.0-month supply at the current sales pace, down from an 8.0-month supply in September. Unsold inventory totals are 14.9 percent below a year ago.

The national median existing-home price for all housing types was $173,100 in October, down 7.1 percent from October 2008. Distressed properties, which accounted for 30 percent of sales in October, continue to downwardly distort the median price because they usually sell at a discount relative to traditional homes in the same area.

“In the second half of 2010, if home values show consistent stabilization or even a modest increase, then home sales could remain at normal healthy levels because consumers would no longer be worried about a price overcorrection,”Yun said.

He added that low home prices also are contributing to extremely favorable affordability conditions. “With the abnormal drop in home prices over the past few years, the price-to-income ratio has fallen below the historic trend line,” Yun said. “This is adding to the buying power of the typical family, with affordability conditions this year at the highest on record dating back to 1970, but prices are beginning to flatten and are poised to rise next year.”

Single-family home sales rose 9.7 percent to a seasonally adjusted annual rate of 5.33 million in October from a pace of 4.86 million in September, and are 21.4 percent above the 4.39 million-unit pace in October 2008. The median existing single-family home price was $173,100 in October, down 6.8 percent from a year ago.

Existing condominium and co-op sales surged 13.2 percent to a seasonally adjusted annual rate of 770,000 units in October from 680,000 in September, and are 40.8 percent above the 547,000-unit level a year ago. The median existing condo price was $172,900 in October, which is 10.4 percent below October 2008.

Regionally, existing-home sales in the Northeast rose 11.6 percent to an annual level of 1.06 million in October, and are 27.7 percent higher than October 2008. The median price in the Northeast was $235,400, down 2.6 percent from a year ago.

Existing-home sales in the Midwest surged 14.4 percent in October to a pace of 1.43 million and are 28.8 percent above a year ago. The median price in the Midwest was $146,600, a gain of 1.1 percent from October 2008.

In the South, existing-home sales rose 12.7 percent to an annual level of 2.30 million in October and are 25.7 percent higher than October 2008. The median price in the South was $151,100, down 6.3 percent from a year ago.

Existing-home sales in the West increased 1.6 percent to an annual rate of 1.31 million in October and are 12.0 percent above a year ago. The median price in the West was $220,200, which is 14.7 percent below October 2008.