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.
For sale: 1. Ikea table lamp +2 ikea bulbs (purchased separately), has 2 brightness modes, in perfect condition 900 dinars. 2. Corner shelf for the bathroom (there are holes for screws, or you can just hang it on hooks) 500 dinars