The TicWatch GTX Smartwatch is currently available for $61.19 from Amazon AU on a limited time deal including free delivery (RRP $89.99). It appears to be the most basic of smartwatches but this is possibly the lowest price ever for a TicWatch.
Specifications (from the Mobvoi website)
160KB / 16MB
IP68 Swim suitable
1.28 inch TFT 240*240
Up to 7 days (regular use)
Up to 10 days (Power saving mode on)