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.
QUICK SALE BWEBAJJA ENTEBBE ROAD NEXT TO ELITE SCHOOL. 3BEDROOMS, SEATING, DINING, KITCHEN AND BOYS QUARTER ON 17DECIMALS MAILO LAND WITH TITLE AT ASKING PRICE 400M NEGOTIABLE.