There’s something priceless about knowing you have security cameras outside your home, keeping an eye on things. Of course, we also love a good security camera bargain, so we’re glad we found a three-pack of Arlo Essential XL cameras available for $200 at Best Buy, half-off from their MSRP. The battery-powered Arlo Essential XL cam can capture 2K HDR videos that allow you to zoom in on any video in search of important details. With the app, you can get instant alerts whenever the cameras detect movement, while filters will keep you from downing in notifications every time a tree branch sways i…