this is a confusing product.
-is this worth 70$? if it was from a square stock, the craftsmanship and made in US is a yes
-is the capabilities worth 70$? if it was made of bronze, maybe, but brass as a pry/cutting/scoring tool is generally the wrong application (maybe if you work harden it?)
-can you make it yourself using hand tools, specifically a hacksaw and a square needle file? definitely yes.
-whats the cheapest kiridashi? technically a utility blade, which is like 10 cents a piece.
classy design though. i'm a sucker for things in cupric