Boker, TI, Dovo, RA, etc., all have large-run production facilities that crank out a massive number of blades (compared to the American makers listed). And so economy of scale must be a huge factor in determining that price difference.

As for the Grim's claim to have been made in the USA, what *exactly* do they mean by that? Where was the blade forged/ground/etc? Were they forged in the USA or reground from blades made overseas? Where were the scales manufactured? Were those components actually made in the USA or assembled there? I don't have the answers to those questions, but I do know that "Made in X" can in many places be a very slippery definition.

Also, never trust a website that misuses apostrophes to make the plural.