I know the seller you are talking about, this is about the THIRD thread about it and his PdN NY in the past week. Please search the archives for a whole discussion.
Anyway, the conclusion we came to was that they are legit, but the older bottle style. Several other members have this bottle style and confirmed that it is okay.
But, as I said on those threads, too, fakers generally go for brands that everybody recognizes. As such, they'd fake Mugler, Tommy, or Armani LONG before they'd do PdN. In clothes and bags, this is why LV and Gucci are faked long before Valextra, Goyard, or Schedoni, despite the fact that these three brands are of much higher price and quality than the other two.
In short, I'd be more worried about the juice having turned from being a few years old than that the bottles are fake.
EDITED TO ADD: oops, tvlampboy and I posted at the same time.