Maybe it's because people are becoming more privacy-conscious these days, but everyone seems to be doubling down on surveillance systems for their homes and vehicles. If you haven’t seen that dash cam video of the staged car crash scam, you really should — it's definitely a wake-up call for the need to document everything.

For Black Friday, there is a remarkable deal on a set of four POE cameras and a home recording device for continuous, 24/7 recording. Usually this set is $600, but it'll be $349.99 (38% off).