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.
Men's Watch 2pcs Fashionable Casual Sports Round Dial Quartz Watch with red dial and Bracelet Accessory Set, Suitable for Men’s Party, Holiday, Birthday Wear as a Gift for Brother, The Best Present for Him (No Box)
