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.
4pcs Set of Men'S And Women'S Watches, Fashionable And Casual Round Dial Quartz Watches with Faux Leather Straps, Suitable for Everyday Wear, Back-To-School Season, Thanksgiving, Couples, And As The Perfect Gift (Watch Box Not Included)