These normally go for $730 at Costco, they can be had for $650 on special several times throughout the year. This seems to be a Costco only model, have not been able to find any other retailers apart from Raw Blend with this deal. Seems to be a "new" refurb whatever that means.
"These Vitamix Aspire units are NEW (unused) but have been returned. These units were purchased in Australian Costco stores by customers and returned unused. Some of these units have been repackaged by Vitamix Australia (the packaging might not be the original).
These units are exclusive to Raw Blend and this is the cheapest price ever offered on new Vitamix units in Australia in the past 22 years. We have limited stock available so they will sell very quickly.
These units carry a full 5 year warranty (which is backed by Vitamix Australia).
Available to Australian customers only, will not ship to New Zealand."
The model is not unique to Costco but the fact that it's a refurb might be. The Aspire is available at a number of other retailers.
It's hard to say if this is a bargain, as it's not a brand new product and there really isn't any comparison to draw, however if you're happy with knowing that at one point it was sitting on someone else's kitchen bench, it's a cheap way to buy a Vitamix!