Just got back from the vendor. Unit looks good, virtually like new. Seems to work and fed into my laptop okay. The trouble is that he has no documentation for it.
I came back with nothing but the serial number.
I explained my concerns were twofold. As a resident alien, I have a lot to lose if I don't 'do due diligence'. Also, Nikon won't register it for warranty without a bill of sale. It may even have been registered by someone. The owner of the shop died, and the vendor lost what little paperwork he had during a house move.
Now, here's a thing. My first Samsung had been registered to someone else before it was delivered to me. It took me about 10 mins to find that out. Nikon don't seem to be so helpful. I spent ages trying to find out about my 18 - 200 lens, which cost exactly the same as the price of this D90 $650. I was able to get a bill of sale for that, but never had any response to my registration - except for a slew of e-mails advertising new Nikon kit.
It seems that it would be easier to get in touch with the dead.
Anyone know a way to actually speak with Nikon?