Selling this HE60, otherwise known as the "Baby Orpheus" for a friend. This pair is in extremely good cosmetic condition, with very few marks of usage and comes with the original storage case as well as: two sets of pads including a brand new pair (only opened for testing purposes) a soldered 5-pin Stax Pro Bias adapter an HD650 headband pad as well as the original (now flaky) one brand new high quality silicone rubber bands in place of the original, now snapped O-rings The HEV70 is broken, but can also be included if desirable for an additional shipping charge. "Electrostatic HD600" is not even a worthy descriptor of these. They are much, much more than that. I would buy these myself if I could afford them. Measurements of this unit are as follows, with the old (flaky) earpads... And the new pads: This is my own custom flat-plate measurement rig I built from scratch, tuned to match Tyll's results as closely as possible. The HE60 is running off of an SRM-212 fed by an LH Labs Geek Out 450. Please note that THD results below 100Hz are susceptible to room noise and thus should be taken with a grain of salt. One note: the right channel of this headphone charges up faster than the left, resulting in a channel imbalance for the first ~5 minutes of use. After the left diaphragm is fully charged the channel matching is nigh flawless as we have come to expect from Sennheiser. Asking price is currently $2100 (USD). PM with offers. Shipping within the CONUS included (international buyers inquire for a quote.) I have 30+ positive trader feedback on head-fi and am a former ABS from Changstar. Photos: Last image appears to be pins from the stock HE60 connector or something of the sort? Unsure.