Right now there are 51 deals from Amazon Resale, formerly Amazon Warehouse Deals, in Electronics › Security & Surveillance › Motion Detectors. These are inspected returns and open-box items that Amazon sells and ships itself. WarehouseHunter puts each one next to its current new price, so you can see what you save at a glance.

Brands with the most offers here: Ring, Leviton, 1byone, Aqara, Bosch, Datacolor, ENERLITES, HTZSAFE. Every item is a one-off, so the stock moves all day and new deals keep arriving.