Updated at 5:25pm 19/6/19:
Looks like they are back to their normal prices. They probably have finished clearing up the excessive stock during the day.
Bunnings Kings Meadows have a few of these Ozito kits out on 'clearance'.
$62.50 from $249 - https://www.bunnings.com.au/ozito-power-x-change-18v-brushle...
Also has this at $99 from $399 - https://www.bunnings.com.au/ozito-power-x-change-18v-ultimat...
Might be available in other stores.