Softiamge 3D Base= $2,995 U.S.
Softimage 3D Extreme (Includes 1 Mentalray and Phoenix Tools Particles) = $4,995 U.S.
However, you can still probably get it down another $500, when you talk to the reseller.
Base is almost the same as Extreme, excpet the the MR license and particles. About the only else missing is Metaclay.
Hope this helps,
Urp