Stuff like this is all about the markup so one would have to layer it on thick! I have plans to make a set of headphones one day but who knows if it will ever happen...
As for the topic at hand, I can't see anything here that would warrant such a price. I have fond memories of the Jade and there they showed zero clue what makes this stuff tick. When they were gone there was naturally the usual "OMG these were great" bullshit but they are still awful.