I only have four cameras left (three large and one small) for $25 each, and each camera comes with a long, 60ft. - 75ft. cable, and the cables are brand new.
Two sizes are available: the smaller style (on the upper left of the picture) and the larger style.
Camera angles are adjustable with an allen wrench and/or a compression fitting (already on the camera) which can be adjusted by hand.
Each end of the cables have a power connector (red) and BNC connector (yellow).
Cameras also have power connectors and BNC connectors.
The last photo shows a better close-up of the connectors.
These can be added on to your current system if you have additional inputs, you can replace a broken camera if you have one, or they can jusy be used as 'decoy' cameras if desired.