Automotive backup / reverse cameras. I have 3 different models, and 6 cameras total. They are all brand new and each one includes video cable and power wires. Just like any camera, backup cameras work at different video signals and resolutions which affects what monitor they work on. I'm a car guy not a tech and software guy, so I can't really speak on what stereos or monitors are compatible, which is why I'm only asking $5 for each one. Many modern stereos have settings you can change such signal format and resolution, so you can often get to work with different kinds of cameras
First model: photo 4. says AHD on it
These are cameras are claimed to be 1080p resolution use an AHD(analog high definition) signal which is commonly used in security cameras. I'm pretty sure it has night vision. Unfortunately all the monitors and stereos I tested these cameras with were 480p resolution and weren't able to work. From what I've heard, they should have no problem working with headunits that run on Android. I have 4 of this model available, and would also be willing to do a package deal for all 4.
Second model: photo 5, says CCD on it
Has 4 LED lights to help illuminate, even at night. Works on PAL/NTSC video format. I tested it on one or two stereos and did get it to work on them. Not sure how high the resolution is on it.
Third model: photo 6
Made of metal, feels solid and durable. Has 8 LED light to help illuminate. When I tested it, the lights came on, but no video, likely just has a resolution too high for the monitor I was using.