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 MacBook in excellent condition: • Model: MacBook Pro 14” M1 • RAM: 16 GB • Storage: 512 GB • Condition: excellent • Battery: 88% • Purchase date: June 2023 • Keyboard: English layout • Charger: original adapter with European plug • Location: Belgrade (Waterfront or Old Town / Center) • Price: 900€ (negotiable)