Amazon with AZDOME has the AZDOME M550 3-Channel 4K (front) + 2.5K (rear) + 1080P (interior) Dash Cam on sale for $120 - $49 off with coupon code GNWR9YOO at checkout = $71 with free shipping. Includes 64GB memory card. 

• Operates in 14°F to 158°F. Includes Motion or collision detection modes. Includes 20 foot cable for installing rear camera.