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: 1. ASUS VivoBook Flip 14 laptop/tablet, AMD Ryzen 5 5500U, 12 GB RAM, 256 SSD, includes a bag, 2 chargers, and a stylus. Good condition, regularly serviced, used infrequently. 400 euros. 2. iPhone 15 pro, 256 GB, gray. There is a scratch on the screen, battery 89%. Good condition, there are many different cases and a charger. 750 euros. Stari Grad