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.
I will sell German Brax trousers 38 D (46-48 rus) and the finest Gerry Weber blouse, natural composition, perfect for spring/summer 44-46-48 rus. 700 d/piece. I will give a discount for simultaneous purchase. Measurements fitting+ Grbavica, other areas.