Before you buy a new GoPro, you might want to take a look at the Mobius cam setup. That's what I use and I really like it. The camera starts at about 80 bucks and with another $30 you can get the docking station and with that you can use it as an fpv camera in real time, either with a screen, or with goggles. I have lots of fpv videos taken with the Mobius cam at my YouTube channel if you want to see how it works.