Lightening Deal from Amazon US on the August Smart Deadlock (3rd Gen) + Connect - Comes in Black or Silver (https://www.amazon.com.au/dp/B0752V8D8D?th=1).
Looks to be the lowest price to date based on CamelCamelCamel and some great reviews online.
Works with Amazon Alexa for voice control (hub required and included, Alexa device sold separately)
Control and monitor your door from anywhere. Lock and unlock your door, control keyless access and keep track of who comes and goes, all from your phone
Be sure you’re secure with DoorSense. Only August has DoorSense to tell you if your door is securely closed and locked
Always know who is coming and going. Track activity at your doorstep with a 24/7 Activity Feed
Keep your existing lock and keys. Easily attaches to your existing deadbolt; use your existing keys at anytime
Locks automatically behind you, and unlocks as you approach
Simple, DIY installation. Install in about 10 minutes with just a screwdriver
Simply Speak to lock your door. Tell Alexa, Siri or the Google Assistant to control your August Smart Lock Pro + Connect
Certified Z-Wave Plus home product. Works with Z-Wave, the leading wireless technology for security and home control products