Nest Hello Doorbell with $30, plus a free Google Home Mini. Including freight forwarder works out to be about $327. Kogan including shipping is $315, which makes it less than $15 for the Google Home Mini.
Will need a freight forwarder as they don't ship to Australia, but I got the same deal earlier in the year and forwarded via ComGateway with no problems.
From the site
The doorbell you’ve been waiting for.
Nest Hello lets you know who’s there, so you never miss a thing. It replaces your existing wired doorbell and delivers HD video and bright, crisp images, even at night. It’s designed to show you everything at your doorstep – people head to toe or packages on the ground. And with 24/7 streaming, you can check in anytime. Or go back and look at a 3-hour snapshot history to see what happened.
Will it act like actual door bell? I mean what if my phone is off or away, will it still sound?
Also i believe it can be viewed in chromecast