Refurb Netgear Arlo 4-Pack, $330

Netgear’s new Arlo home security system is a lot like Nest Cam, except the cameras can run off battery power, so you really can stick them anywhere. If that sounds like something you’re looking for, Amazon will sell you a refurbished four-camera starter kit for $330.

For context, buying four cameras new would set you back about $470, so you’re saving a bundle with this one-day refurb deal.