Tired of the drumbeat of negative news about the housing market, the nation's real estate brokers are trying to change the tune.

This weekend and next, the National Association of Realtors is spending $40 million on full-page ads in the nation's biggest newspapers to convince people the market is A-OK.

"Right now may actually be one of the best times to buy a home," the ad says.

But at least one marketer isn't buying it.

"It's preaching to the choir and goes in the face of objective reality," said Peter Sealey, a former Coca-Cola Co. global marketing director who now runs consulting firm Sausalito Group Inc.

"I predict it will have zero effect on the marketplace," he said.