The Garmin BC30 is an add-on that works with many of the Garmin GPS systems, turning them into back up cameras for your vehicle. I got mine at Amazon for about $150 and had it professionally installed at a local Best Buy store for another $50. The system works great.
After a back injury, I find it hard to turn and look back when parking my car in busy lots. Newer cars offer backup cameras, but I was not ready to buy a new car. This was the perfect solution. The Garmin BC30 is a bright camera, that provides a clear view of everything being my vehicle and a wide view as well. When backing into my driveway, I can easily see both right and left walls when inside of 5 feet from the garage. In my case, it also has an adjustable guide line that I use to line up when backing using the camera as my means of looking back. Even with the wide view, I still look up and check right and left to be sure traffic is not coming beyond the camera view, but once this was installed, I had used it every time I drive my car. This device is highly recommended.