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.
"Discover the power of the Alter Bicycle Electric Conversion Kit and turn your regular bike into an electric one. This affordable, easy-to-install kit offers a seamless way to enjoy the benefits of an e-bike without buying a new one. Whether you're commuting or cycling for fun, the Alter conversion kit boosts speed and range, making your ride more efficient ...