For today only, this Zmodo 4CH Night Vision Security Camera System drops from $299.99 to $199.99 at BestBuy.com. Plus, the shipping is free. This is the lowest price we could find for this set by $40. These cameras capture 720p video that stream to your smartphone, tablet or laptop without any additional service or subscription fees. They're also waterproof so they can be used both indoors or outdoors and can be set up to send motion-detection email alerts. This model includes a 1TB hard drive and sales tax is charged in most states.