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 shoes, worn little: 1. Leather sandals vagabond size 38 (very cool!) 2000 dinars 2. Green loafers, thin Italian leather size 38 (more suitable for size 37, you need to measure) 2000 dinars 3. Sneakers for running or walking size 38 1500 dinars