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.
Selling a 24”/13” VENSSINI PARMA bike. Good condition, everything works. Reason for selling: the child has grown, bought a new one that is bigger. Price: 12000 dinars. Pick up at Brace Ribnikar