NuPrime DAC10H preamp/dac/hp amp w/ full TDSS mods

This full function (remote controlled preamp,dac, headphone amp) front end is a marvel of functionality, flexibility, compact size, reliability, beautiful construction and above all excellent sound. I've used this in great sounding systems for about 4 years. The stock unit is very good, but this has full TDSS mods, which take it to a new level. The TDSS mods are all passive - internal RF suppression and mechanical damping. No components have been altered or changed, but to me the $500 was the best $ I've spent for the performance improvement.
Inputs: 2 line level, 2 coax digital, one usb, 2 optical. Outs: balanced and single ended. HP outs - 1/4", balanced.
The unit is in excellent condition, everything works. Includes aluminum remote, original excellent packaging, power cord, manual and TDSS certification. The 3 stickers for the power and volume controls on the front are a help for my eyesight and can be easily removed if desired. I've simplified a system and this is now surplus for me. I still happily use one of these in my main system. This lists at $1795, mods were $500. The value for a superb sounding, flexible remote preamp, DAC AND headphone amp is off the charts at full price, imo. At half price it is kind of ridiculous. Thanks for having a look!