First of all, their price is showing up as $518.95, not 416.95. But more importantly, they offer a 110% pricematching policy and MOOSEJAW is selling the Nuptses for $360.50 (although they only have one size available). That would make the boots $344.
If you are interested in these boots, you could probably use that pricematch policy to find a good deal.
Zappos has the Trango extremes for $364, Sierra Trading Post has them for $215. With pricematch, you should be able to get them from Zappos for $200 with free shipping.