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.
Reserved T-shirt - height 158 - 300 din Shorts - height 182 - 500 din Men's shirt M-L - 500 din Jeans, trousers (photo in PM). By agreement I will bring to the center of NS.
