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.
iPad 10.2" (9th generation) 64GB Wi-Fi + Apple Pencil + original case. Price: 40,000 RSD (can be in rubles). In excellent condition - no scratches, always in a case. Rarely used. Includes original Apple Pencil and case. Headphones and adapter as a gift.
