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.
MacBook Pro 16" 2019 Made in July 2021. Rare configuration: Intel Core i9 2.4GHz 8-core processor RAM: 32GB SSD: 512GB In excellent condition. No repairs. • Battery: 85% / 468 cycles • Total usage time - 849 hours • Included: laptop + original charger.