I have clean iphone 6s for sale,at a good price pm if you are interested.
It seems the seller here are the same person claiming he is selling Samsung Galaxy S7 edge, see this reference:
https://bitcointalk.org/index.php?topic=1905364.0 . Another is their profile is highly identical, both posts don't have proofs or any further details about the product they are selling. Highly distrust this person, or if possible. Hire an escrow during your transaction for the safety of both the seller and buyer.