We both stared at the same abstract painting and exchanged theories. I joked about not "getting" modern art, and you laughed with your whole face. Where’d you vanish to after the sculpture garden?
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.