I had trouble finding one when I was ready to buy a couple of weeks ago. Ended up going through Davidson's. Got it for $950 total. Not a great price, I could have saved $75-100 had I been more patient. I never tried CDNN, but in retrospect I should have. Buying through Davidson's was easy, just did it all from their web site and picked it up at the lowest cost dealer in my area.
I looked on the forums, only found two that were lightly used and both were in the $900-$950 range so I just went ahead and bought new.