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 am advertising my 2018 LEXUS LX 570 for sale at the rate of $20000 because i relocated to another country, the car is in good and excellent condition, contact me
I want to buy your car
Send me your number please