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 jar (read: ideal vase for flowers) Ikea. Very convenient for flowers, because of the wide neck, easy to wash and easy to change the water (much more convenient than classic vases). 400 dinars/rubles to the card. Belgrade, Borca (or meeting in the city, as agreed). P.S. Photo with flowers for example, the cat is not for sale