That's how it should be.
Those are like Beats on audiophile marketing.
I'll rather get the Beats mixrs instead of D7100s.
Prices should be like 250€ for the D600 and maybe like 500€ on the D7100.
The Denon D400s Urban Raver went from 319€ to a hipster price of 159€.
That already shows how worth they are overall.
I think those prices seem a lot better and probably would make these somewhat competitive. Due to the comfort and somewhat better than apple buds SQ of the D600, I wouldn't mind picking up a pair for travel at around $150.