The seller was not under any obligation to 
explain where it came from, but unlike those who 
keep quiet and simply let buyers make incorrect 
assumptions, they were quite clear on the 
matter. I don't think they were being 
unscrupulous; if they were, the BIN price would 
have been higher. And as I said, it had a douga. 
We'll never know for sure, but in this 
particular case there is no reason to believe it 
was a repro and not the real deal.