I have for sale several used Axis Wired/Wireless Cameras.  These cameras were $300+ each new and are in great condition. Axis Cameras are supported on about every device on the planet.  The cameras support multiple H.264 streams and will work with the free Axis Software or any of the hundreds available online. The cameras have a PIR sensor built in, an illumination LED as well as 2-way audio with a mic and speaker.  The cameras also have an I/O port that supports open/close and multiple other sensor types.  All Mounts and adapters are included for both wall and ceiling.  Connectivity will work over both the included ethernet port or the built-in wireless. All cameras were taken out of a working environment and have had defaults set and video tested.  These cameras would work great for a home or business security system.  Would be willing to do a packaged deal if interested in all 12 Cameras. Price is per each or best reasonable offer. Let me know if you have any additional questions.