First generation iPad mini. 64GB. Working. Screen is broken, but everything works. iOS 9 installed. I'll exchange it for something interesting. Priority is an old iPhone 4, 4s.
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.