For brand new you're not going to do any better... B&H sells the body only for I think around $2300.

I've been tempted myself to order one of those from the auction house - there's a seller I bought a bunch of new Mamiya gear from who is located in Japan last year. Took a few weeks to arrive in the U.S., but it was all as stated, and brand new, and much cheaper than can be bought here.