V4InkToner via eBay offers this 4.3" Car LCD Monitor with HD Night-Vision Rear View Camera for $28.99. In-cart, it drops to $23.99. With free shipping, that's the lowest total price we've seen for such a kit. (We listed a similar one with a smaller display for $6 more in February.) It includes a 4.3" LCD monitor, night-vision HD camera, and two power cables.