http://store.yahoo.com/purplus/carstud11.html
It's a bundle of the Carrara Studio 1.1 and Amapi 5.1 3D modelers for $60.71 (includes shipping). Carrara is a really cool 3D modeler built off Ray Dream Designer and InfiniD. Amapi is a standalone NURBS modeler that you can use on its own or to handle the NURBS bits for Carrara. That's a lot of 3D for about 1/50th the price of a new 3D Studio Max.