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.
Hello everyone! I'm selling a dresser with a changing table (Ikea). In perfect condition, the price of the dresser in the store is 25,000 + delivery to NS. I'M GIVING IT AWAY FOR 15,000 din. The changing table is very convenient, wide, and can then be used as a dresser. There is no space for it due to the move.
