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.
Bicycle for sale due to non-use. Condition - average (there are traces of corrosion, as it stood in the yard). Both tires and lights have been replaced. The rest is working. The seat is comfortable, it is better to replace the basket, I will give the lock for free. Price 8500 Dinar (negotiable)