Seems to be slowly dipping in price in recent times
Probably limited qty
A random Review can be found here
Profile correction can be done using a few software tricks
Windows - Equalizer APO
Android - Wavelet
A random Equalizer APO Profile
Preamp: -3.2 dB
Filter 1: ON LS Fc 40 Hz Gain 3.0 dB Q 1.0
Filter 2: ON PK Fc 277 Hz Gain -1.7 dB Q 4.0
Filter 3: ON PK Fc 1650 Hz Gain -2.0 dB Q 3.0
Filter 4: ON PK Fc 5191 Hz Gain -6.0 dB Q 6.0
Filter 5: ON PK Fc 8200 Hz Gain -2.4 dB Q 5.0
Filter 6: ON HS Fc 12000 Hz Gain -3.0 dB Q 1.0
These are great bang for buck at this price, very solid headphones.