The Resonessence Herus DAC is one of the best DSD capable audiophile quality USB to Headphone DAC devices. It retails for $350. It also works with iOS using the USB Camera Kit cable and with Android. It is a seriously good product and it ran my LCD-X with no issues.
When you use it as a pure DAC unit, it is an upgrade to the built-in DACs of many excellent devices such as the WooAudio WA7.
I'm selling it for $245 including shipping and PayPal fees. It will include the retail box, carrying case, and a short USB cable (this does not usually come with the device). As you can see in the pictures, it is in perfect condition.