Hi, long time lurker and first time deal poster, as per the 20% digidirect sale currently going on, the SELP18105G has stooped back down to the $550 mark. I definitely recommend pulling the trigger on this if you don't have an entry level Sony E-mount zoom lens as the SELP18105G is an all-rounder great lens if you are shooting on a budget.
Credit for the 20% off sale: https://www.ozbargain.com.au/node/525344
APSC lens not the full frame one if you are too lazy to search for it!