I've seen these things priced anywhere from $50 all the way up to $800. I just bought a VanTop 10" Frt & Rr Camera from Best Buy on sale for $90. A hardwire kit & a chip added another $30. I haven't tried it yet, so the jury's still out on how it performs. The rear camera is small and my initial plan is to mount it on top at the rear edge of the spider. I'll glass in a bump in that area to enclose it. Will that make my car a GT41? Anyway, I figure that location will not only let me see what's in back but also anyone in those blind spots on the rear quarters.