Back on popular demand, cheapest ever, it's a newly launched Blackvue styled dashcam from Xiaomi. It's got an inbuilt wifi to download videos directly to your phone.
Use Coupon code XIAOMI70DVR1 or XIAOMI70DVR2 to get this special price of $28.69 USD that converts to ~ $37.56 AUD as per Google.
Official page : https://www.70mai.com/mai-carcorder/
Just install the app, create an account using your email address and start using.
Generally 2.5% further cashback from Cashrewards, but it might not work as mentioned by Stuhtb in the comments below.
App download:
For Android users: http://rom-cdn.midrive.com.cn/70mai_dashcam_v1.0.3_20171124-…
For iOS users: https://itunes.apple.com/us/app/id1291163289?l=zh&ls=1&mt=8
FAQ
It's showing me higher AUD price than mentioned in the title
* Choose USD as your currency from top left hand corner. Don't select AUD, always choose to pay in USD, it will work out cheaper even after your credit card conversion fees. Also read the below.
How do I ensure I get the cheapest AUD price possible
* To avoid higher currency conversion rates and to get cheapest price from these Chinese websites, you should get a credit card that charges zero currency conversion fees. 28Degrees, Bankwest Zero, Coles Mastercard are generally popular. Irrespective of what credit card you use, always choose to pay in USD on these Chinese websites, (Choose "USD" from top left hand corner). Additionally set your Paypal so it "bills you in the currency on Seller's Invoice". To set your PayPal account this way permanently, follow the steps shown in these snapshots [Highly recommended]
Cashback may not be payable if you use a coupon code that is not listed on this site. Unless the codes get listed on CR, good chance the cashback may not be payable. Also the cashback rate is 2.5% I believe.