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.
Selling an electronic synthesizer MK-812 61 keys, there is a switch between touch and press modes Excellent condition, all functions work, no damage Works from the mains, cable included. It's 4 months old according to the receipt. Used little.