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 a new, very beautiful swimsuit for a girl. It will be great for size 92. It was a little small for us for size 98. Together with delivery it cost 2800. I will give it for 1800 din.