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.
4 RENTAL UNITS FOR SALE BWEYA KAJANSI ENTEBBE ROAD EACH WITH 2BEDROOMS, SEATING, KITCHEN AND TOILET ON 13 DECIMALS WITH TITLE EACH AT 400,000. INCOME 1.6M PER MONTH. PRICE : 170M NEGOTIABLE.