Best Buy has the Vantop HF612L 4K Front (4K) and Rear (1080p) Mirror Dash Cam w/ GPS on sale for $140 with free shipping.

12" IPS touch screen (1920 x 380), records 3840 x 2160 at 30fps, Sony 4K sensor, night vision, auto-records 30-seconds when detecting collision (includes GPS data for insurance), supports up to a 128GB microSDHC / microSD (not included),