<<SOLD>> I purchased this NOS 19 in August, 2016 from Magni Hifi, Audio GD's Netherlands distributor. They modded it by converting the ACSS output pair to a 2nd RCA output pair (extremely useful). This DAC has the Amanero USB module, but I never actually used its USB input; I always connected this via a S/PDIF converter w/high quality coax connecting to the NOS 19 (wonderful sound that way). For more information: http://www.audio-gd.com/Pro/NOS/NOS19/NOS19EN.htm I installed the NOS 19 in my primary system (desktop speakers + sub + headphone) and never looked back. The NOS sound completely changed my relationship w/digital music (for the better). I'm only selling it because I just upgraded to another NOS DAC, the MHDT Labs Orchid. I never opened the case or moved this unit during the ~3 years I've had it. It's in perfect working order. In taking pictures, I noticed a minor paint scrape on the upper case. Otherwise perfect condition. My price was $550; it's now $500 (bottom price). That includes shipping & Paypal fees in CONUS only. Please, no trades or lowballs. Note: This is a rare DAC. I've only seen 1-2 F.S. during the time I've owned it. The NOS 19 looks identical to the DAC-19, 10th Anniversary, which I also own (there are many more DAC-19s floating around)--but because the NOS 19 is true non-oversampling, it's a different design & a different sound.