Birkin of Seller: Onquestyle I believe this is OK, small untidy stitching on back left handle attachment. I wish this sellers pictures were not quite so over exposed and super high resolution as they make the bag look weird sometimes.
Birkin of Seller: NYFashionExpert is authentic in my opinion.
I am definitely not an Hermes expert, but I happened to have stopped by Onque yesterday, and saw this bag, and it looks much better, in the authentic sense, in real life. They are a brick-and-mortar store, so I am sure if there were any issues, they are easy to get a hold of, which is always important to me. I have no affiliation with this store (in fact, I think they are somewhat over-priced for used items), but they do tend to have Hermes all the time).