I purchased these both brand new directly from Channel Island Audio in April of 2011. They are in mint condition, never abused. They drove everything from Sennheiser HD600 (300 ohms) to Grado RS2i (32 ohms) -- perfectly. I chose this amplifier over several others by direct comparisons (e.g., Schitt Asgard, Grado RA-1, Headamp GS-1 (!), Elekit w/ WE 396A D-getters, etc.). It's very good.
I'm going to a computer based system so I want to going to a portable headphone amp-dac. I'm willing to entertain trades for something like the Centrance Dacport, Ray Samuels Predator, Headamp Pico, etc. of approximately equivalent value. I would prefer to sell the amp and power supply together.
I posted this on Audiogon as well since I have very little selling feedback here (I only got into headphones about a year ago). I have tons of positive feedback on Audiogon. Here is the ad there: