The person I got it from has 6000+ feedback at 98.7% positive.
My old nudies are Nudie thin finns and the pocket stitching is orange, not white. The ones I bought recently are the ones with the white stitching (Ecru Embo)
Now, on my old nudies, the button above the zipper had white words. This is a picture of my OLD nudies. http://i1201.photobucket.com/albums/bb357/hyudryu/IMG_20120121_000050.jpg
And on the new nudies, they don't have the white words. Also, these jeans didn't come with the "Dry Denim - Use for 6 months before first wash!..." label.
On my old nudies, the zipper was also golden (not real gold of course), and made by YKK, but on the ebay bought ones, the zipper is copper, and oxidixed a bit. The tag next to the leather patch is made of a material that feels like those paper egg cartons, and the ink looks a bit faded.
One more thing, when I first got my previous nudies, they were new and they were not stiff at all. The Ecru ones on the other hand, are pretty stiff. The cloth just feels more rough.
So what do you guys think? If it's fake, I can probably just file a claim on Paypal and get a refund.