Rear view camera for trailer

I am also looking into a reasonably priced rear view system. I did go the cheap route on Amazon and had fair results for many years. I actually used and still using a License Plate Camera(wireless). The problem with the cheaper models is the intermittent operation as in going over a bump might cause the screen/camera to go off and on.

I've just grown tired of this hence I want something better..wireless preferred but I could go wired too since I have the old wires still back there. I'll keep my eye on this thread.