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 are 2 scooters from Decathlon: 1 adult and 1 kids. I know that they were used for some time, but, in general, the condition is good. Adult - 4000 dinars, kids - 2000 dinars. The price for both is 5000 dinars. Self-pickup is preferred. Mirijevo 2
