Which GoPro is best suited for my situation

[Jm526]

I love fishing and want to start using a GoPro to make some fun videos. I plan on using some different attachments on my boat and using a chesty while I'm fishing the banks. I'm looking into buying a used GoPro. I never used one so I don't know which one I should go with. The hero 2 is super cheap but so it the quality. Should I bump up to a hero 3, if so which one? Or should I spend the most and opt for a hero 4? Thanks for your input. 

[Philo Beddoe]

Before you drop a bunch of money on a GoPro, check out the reviews and comparison videos on youtube of SJCam cameras. Way cheaper than GoPros and vids look just as good or better to me.