Right now there are 456 deals from Amazon Resale, formerly Amazon Warehouse Deals, in Electronics › Security & Surveillance › Surveillance Video Equipment. 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: Tapo, ZOSI, ANNKE, System, REOLINK, Ring, Spy, Arlo. Every item is a one-off, so the stock moves all day and new deals keep arriving.