P.C. Richard and Son offers the Blink XT Home Security Camera System for $78.99 with free shipping. That's the lowest price we could find by $21. (For further comparison, we saw it bundled with an Amazon Echo for the same price three weeks ago.) Compatible with iOS or Android devices, the system includes a wire-free indoor/outdoor camera, sync module, and mounting kit. Features include:

up to 1080p video resolution


night vision, motion detection, & temperature sensor

802.11n wireless

alerts, live viewing, and remote control via Blink Home Monitor mobile app

voice control via Amazon Alexa

free cloud storage for up to 2 hours of clips

2-year camera battery life