As one of its daily deals, Best Buy offers the Defender Pro 1TB 6-Camera 8-Channel Indoor/Outdoor Wireless Security System in Black, model no. 21313, for $479.99 with free shipping. That's the lowest total price we could find by $220. It features night vision for up to 100 feet, 750-foot wireless transmission range, 1TB hard drive, and two USB ports. Deal ends today.