They sell for 100milion dollars (pinky to corner of mouth)
They are worth that because they are one of 3 headphones that there is a photo of me partially clothed with. (the other 2 being the AKG K240 monitor {it was my first time, what can I say}, and the Grado HP-2.)
Seriously:
4000 to 6500usd. you are 6-8 years late to the $2000 party.
Why:
They have a very unique sound. Nothing else sounds like these do. With at least several dozen choices for headphones that everyone assumes should sound good very few actually do after long term ownership and critical listening. Here is one of them. Do they have a "sonic character"? Sure they do! Do they consistently perform excellently on a wide variety of music over several aspects of quality (detail, soundstage, placements, clarity, instrument separation, etc)? Absolutely!