As I said, the term is entirely dependent on the economic perspective of the individual. And that includes the "value" to the individual buyer.
If Tracker Dan knives are selling successfully at those prices, it's expensive, not overpriced.
But for a buyer who values a knife comparatively, those Tracker Dans will appear "overpriced".
Here is a good example. Let's take a Randall 1-7 and a Blackjack 1-7. I've had both knives at one time.
In your opinion is the Randall "overpriced"? And would it still be "overpriced" if the Blackjack didn't exist?