CAPE CANAVERAL, Fla. (AP)  Here is a recession bargain: the space shuttle. NASA has slashed the price of the 1970s-era spaceships to $28.8 million apiece from $42 million.

The shuttles are for sale once their flying days are over, which is scheduled to be this fall.

When the National Aeronautics and Space Administration in December 2008 put out the call seeking buyers at museums, schools and elsewhere, the agency received about 20 inquiries. An agency spokesman, Mike Curie, said he expected more interest, especially with the discount.

“We’re confident that we’ll get other takers,” Mr. Curie said Friday.

The Discovery is already promised to the Smithsonian National Air and Space Museum. The Atlantis and the Endeavour are up for grabs. It is possible that the Enterprise, a shuttle prototype that never made it to space, will also be available. The Enterprise is currently at the Smithsonian.

Mr. Curie said no decisions would be made before summer.

The lower price is based on NASA’s estimate of the cost for transporting a shuttle from Kennedy Space Center to a major airport, and for displaying it indoors in a climate-controlled building. The travel cost may vary based on location. NASA has moved up the delivery date to the latter half of 2011, instead of 2012.