I contacted the original seller, and she explained the bag was purchased at the Tom Ford boutique in LA. She also gave me a good idea (albeit perhaps too late) that I should have asked the lady who is accusing me to go to the Tom Ford boutique (she also lives in LA) to obtain a proof that it is not authentic, because since the bag was bought there, obviously they will tell her right away it is real.....
However, I already agreed to accept it, and now awaiting the bag to be shipped back to me. So far, nothing from the buyer, who was so eager to get her refund "NOW". I remain anxious and deeply disturbed as I await the return shipping. Paypal has advised me to videotape opening the return bag to ensure she ships the actual bag back and in the same condition.
The lady's comment in paypal was that she has another one of a different color, and everything should match between her other bag and this one except color, but this one is different leather, etc....Therefore she determined it is a "horrible fake". I tried to explain to her it is the original edition and of course as we know the leather type varies between season, etc. But no response....
What an ordeal!!!
Update: received notification the bag was shipped back.