Used Chord Mojo DAC/amp for $399 w/free S&H

The price of the Chord Mojo (the portable DAC/amp with the marble buttons) is diverging in opposite directions. The new condition price increased to $579 but the used price has dropped to $399 with free shipping by seller “Audio Advice Online” through Amazon Warehouse Deals in “Used – Like New” condition. This ships directly from AAO and it is not Prime eligible.