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.
The stock market looks very fancy & appears to be a gamble. If you are thinking that way, then you need the right stock trading course to understand what stock market trading is. With no knowledge & proper education to make decisions while trading, can make your career & finances more risky. The stock market is not much like gambling in casinos, ...