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.
1 ACRE AND 10 DECIMALS OF LAND FOR SALE AT SEGUKU HILL NEXT TO PRAYER MOUNTAIN WITH CLEAR LAKEVIEW AND GD NEIGHBORHOOD. IT'S PRIVATE TITLE AT ASKING PRICE 1.2BN UGANDA SHILLINGS NEGOTIABLE.