Perhaps I’m just out of the loop, but it seems to me that it used to be only really established makers (e.g. Sebenza, Randall) who could get away with asking $400 - $500+ for a knife. Now, it seems like there are lots of knives in that price range, many from makers I’ve never even heard of.
Nowadays it's a lot about the materials used and general cost of doing business. Even Spyderco's budget range make me look twice since I'm still used to their pricing 10+ years ago.