shoponkyo.com has a referb. 706 for $549 w/ free shipping. I think you get another 10% off if you join the club, which just puts you on the mailing list. They have never bothered me in almost a year and I have had zero problems with my refirb. 805.
Minus the extra 10% is $494 delivered. I understand a 706 is not a 705 though.