Seems like the lowest price at the moment. You can have this action camera for $449 via the Sony $50 bonus gift card offer.
It has good reviews.
You can make a price match request here if you prefer to buy it directly from Sony.
FEATURES
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
Don’t forget to take off 5% with coupon code 92RFLE0M94J67B to bring the price down to $474.05