Never pay down a deposit in a bank account until you have met the seller, seen signed a purchase agreement.
No serious private advertisers ask for a down payment before you meet.
Receiving an email with an in-scanned ID does not mean that you have identified the sender. You do this on the spot, when you sign a purchase agreement.
I'm selling an original Korean Samsung S7 Edge phone, and it works perfectly. It has 4GB of memory and can charge quickly with a cable. This phone has 32GB of storage, and the battery is still in good shape with a 3600mAh capacity, so it lasts a long time between charges. If you want a reliable phone that's in great condition,