As one of its daily deals, Home Depot offers the Defender Connected Pro Wireless 8-Channel 1TB Surveillance System with Six Wireless Cameras in Black, model no. 21312, for $549.99 with free shipping. That's the lowest total price we could find by $150. This indoor/outdoor system features an 8-channel DVR, 1TB hard drive, six 520 TVL cameras, 750-foot maximum wireless transmission range, and night vision to 100 feet. Deal ends today.