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 gaming chair for 2000 din. Bought it a year ago, but the quality wasn't great - a pin came out of the seat (2nd photo) and it wobbles, so I'll give it away cheap. Overall, it's okay to sit on. Pick-up, Bistrica, Đorđa Nikšića Johana