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: 2015 Maserati Ghibli Base Coupe General Exterior Details: Rear bumper scratched and slightly dented. Vehicle appears to have been parked under a tree; leaves have stuck to the exterior. Likely needs professional cleaning and polishing. General Mechanical Details: Needs jump packs to start. Battery in trunk, jump point in front under hood. Year: 201...