I think this the the cheapest it has ever been. I havent bought it yet as I was more interested to know if it is worth the $300 extra price tag compared to VIOFO.
Front Only Model is $450 too
https://www.ebay.com.au/itm/Thinkware-U1000-4K-Dash-Cam-32GB…
There are few other great deals from the seller.
4k is not worth as the frame rate will be 30fps. 2k frame rate will be 60fps. Viofo A129 plus duo is good.