Not as good, but I should note that Zoro has the MX-5210 at $713 and they are running a 25% coupon (SAVETEMBER) until Sept 28, so that's $534.
They did run a 30% coupon briefly last week, which would have gotten it down to $499.
They don't seem to offer the Metcal promo from the OP.
Zoro's prices and stocked items are all over the place, but with somewhat frequent 20/25/30% off, that makes some items very competitively priced.