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.
Selling my Segway Ninebot MAX G30 electric scooter. Purchased about 1.5 years ago in Belgrade, used very little - mainly for trips from home to the office within the city. Mileage is only 336 km - an excellent indicator of minimal use; All mechanisms are in good working order, you can connect to the scooter via the app on your phone; The maximum speed is up ...