SmartThings offers its Samsung SmartThings Motion Sensor 5-Pack for $112.99. Coupon code "WELCOME10" cuts that to $101.69. With free shipping, that's tied with our mention from two weeks ago and the lowest price we could find by $23. It connects to a Samsung SmartThings Hub (sold separately) to turn connected lights on and off as it detects people or unexpected movement.

Also available is its Samsung SmartThings MultiPurpose Sensor 5-Pack for $112.99 before the code above, $101.69 after. With free shipping, that's the lowest price we could find by $23. It connects to a Samsung SmartThings Hub (sold separately) to detect vibration, orientation and angle, temperature, and when things open or close.