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 my Apple devices: 1. Macbook Pro 14 M1 16Gb/512Gb. Excellent condition. My wife's former laptop, bought in 2021. Used the laptop mainly at home, a significant part of the time it was on a stand with a connected bluetooth keyboard and mouse. Carried it with us very rarely, so the case is like new. Everything works perfectly, it's M1, you know. 1200 eu...