The median price fell between 13 and 19 percent from a year ago, according to four separate reports, and sales were off by half from last year's totals.

"The city did a nosedive; there was virtually no business," said Dottie Herman, president & CEO of Prudential Douglas Elliman, one of the largest real-estate brokerages in New York.

Multimillion-dollar apartments were the hardest hit. Luxury buyers vanished as Wall Street bonuses and jobs dried up and so-called jumbo loans for anything over $729,750 remained almost nonexistent. That loan limit is less than the median price of a Manhattan apartment, which ranged from $760,000 to $849,000 in the reports.

"We're talking lenders requiring 30 to 40 percent down [payments] for jumbo mortgages," said Jonathan Miller, president and chief executive of real estate appraisal and consulting firm Miller Samuel Inc. "What does that do to someone buying a $4 million apartment?"

The median sales price of a luxury apartment - defined as the top 10 percent of all condo and co-op sales - tumbled between 17 and 26 percent, while the number of sales were cut in half.

Sales of new condos were also hobbled because of recent changes in Fannie Mae financing, which has made it harder for buyers to get mortgages, Miller said. The government-controlled financier now requires a development to be 75 percent sold in New York before doling out any mortgages to potential condo buyers.

A supply glut also worked against prices. The number of homes on the sales block grew in the second quarter and the average time to sell an apartment was 129 days, up 48 percent from a year ago, Brown Harris Stevens reported.

In a positive sign, however, sales picked up at the end of the second quarter, Herman said. Sixty-one percent of all sales were below $1 million - which is considered the lower-end by New York standards - compared to 49 percent a year ago, Miller said. *