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.
10.75 perches 10.5 Million 4th house from Maharagama - Piliyandala ( 341) road & Dolekanaththa Junction 50 m to Kottawa - Piliyandala ( 296 ) road. 2 km to Piliyandala town. 4 km to Maharagama town. 4 km to Kottawa town. 4 km to Pannipitiya. 5.5 km to Kottawa High way Entrance. 300 m to Keels Super