NuPrime DAC10H remote dac/preamp/HP amp w/ TDSS mods

This full function front end is a marvel of functionality, flexibility, compact size, reliability and above all excellent sound. I've used this in a great sounding high end, high resolution system and everyone who has heard it has been impressed.
The stock preamp is very good, but the TDSS mods take it to a new level that is truly top shelf. 
Inputs: 2 line level, 2 coax digital, one usb, 2 optical. Outs: balanced and single ended. HP outs - 1/4", balanced.
There are lots of posts about the stock model online; I like it so well I bought a 2nd unit and had it modded too.
The TDSS mods are all passive - internal RF suppression and mechanical damping. No components have been altered or changed. To me the $500 was the best $ I've spent.
The unit itself is in excellent condition, with only 2 pinhole size marks on top, and some paint wear on the edges of the remote. Everything works as new. Includes remote, original excellent packaging, power cord, manual and TDSS certificate.
Unit now lists at $1995, mods were $500. The high end value at less than half price is off the charts, imo.
Thanks for having a look!