AutoCAD LT is currently available from at least two vendors here in the U.S. for 719.99 after Autodesk rebate, both offer free shipping.
I can’t say how long Newegg and/or Amazon will keep their current price, but the $300 rebate is available for any purchase of AutoCAD LT made between May 1 and July 18, 2010.
You can also buy AutoCAD LT from the Autodesk Store, but it will set you back $160 more.