You just missed one on eBay, went for $325 plus shipping, used. PM nikesmoke98, he was the seller and may have another, tell him I sent you. $350 including shipping for a new one is a darn good deal! You're not going to find better, at least not new IMO. If you don't take it I may stand in line for it. Cheers!
edit: that was a 6400 on eBay, which means Jim is giving you an even better deal; however, it was a set on eBay. Jim, I'm behind Steve if you don't sell it to the op.