Purchased new from dealer in Canada about 3 years ago. This is an original HD2 with the Audyssey MultEQ XT, not an HD with an upgrade card (not that it matters I guess but wanted to be clear on capability)
The unit is mint and fully functional. I had it fully inspected by a local NAD authorized repair shop about a year ago and everything came back as working well. The sound from this preamp is warm and rich. It lends sparkle to the high end without being overly bright. The sound is fantastic and I would put it up against preamps twice as expensive without hesitation.
I mainly used this preamp for watching movies on occasion. It has seen little use but never fails to impress. I have the full double carton it came in originally and all packing materials ensuring smooth transit to you.
Please feel free to ask questions!