TomTop offers this 4K 2160p 16-Megapixel WiFi Ultra HD Action Camera in Black for $36.99. Coupon code "LCXFHWA13" cuts it to $23.99. With free shipping, that's the lowest price we could find by $25. It features a 2" LCD, 4K 2160p video capture at 30 fps, waterproof case, and time lapse, loop recording, and slow motion modes.

Note: This item ships from China and may take up to four weeks for delivery. The countdown timer on the product page does not reflect an actual expiration time and resets daily.