You are in the US?
I have never seen such a document offered in any for sale ad I have studied. And I have studied them for a decade or more now.
A grey market import should only be judged on condition with no premium paid for "low mileage". It would have to be exceptionally clean or exceptionally inexpensive for me to buy one.
Why didn't he take you along on his buying adventure? Sounds like he overpaid royally. Sorry to hear ...
G