Seems like lowest price at the moment. You can have this action camera for $449 via Sony $50 bonus gift card offer. It has good reviews. You can make a price match request at
"https://store.sony.com.au/actioncamera/FDRX3000.html" if you prefer to buy it directly from Sony.
Advanced FDR-X3000 Action Cam offers dramatic 4K POV movie shooting with reduced shake via Balanced Optical SteadyShot using the well-protected body.Take Action Cam diving to 60 m/197 ft using supplied Underwater Housing -no need to buy optional gear.
4K Ultra HD for four times the detail of Full HD
SHARP, ULTRA-WIDE ZEISS TESSAR LENS
Reduced shake with Balanced Optical SteadyShot
EXMOR R CMOS SENSOR WITH ENHANCED SENSITIVITY
BIONZ X™ image processor
Record fast moves and smooth action up to 4K at 100 Mbps.
Wi-Fi and GPS