Get this Swann 8-Camera DVR Security System for $329.99 and free shipping at B&H Photo. This was the best price we found by $73. It comes with eight full HD (1080p) weatherproof cameras that have night vision and built-in motion sensors. The main unit has a 1TB hard drive for storing video feeds and the main unit can connect to a home network over Ethernet, so that you can look at video remotely on a mobile device. There is no sales tax (except NJ and NY).