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.
For sale: New Sony xm5 wireless headphones (silver color). Lightweight, premium, stylish! Bought yesterday at Technomania (got the last ones in this color). They cost 54999 dinars. There is a receipt and a 2-year warranty. Reason: there was no opportunity to try them on in the store, and after the purchase I put them on and didn't like how they looked on my ...