Used GoPro? Which model is good enough?

[GoodEnough]

Just need something to capture basic video.

I HATE that crinkling waterlogged audio sound.
Do the new ones fix that?

What used models are there?
Hero? Hero 2? Hero3 ?

 

[gizbug]

I am thinking of buying the Hero4 but not seeing much reviews on here about it....

 

[Imp]

Sort of a necro... but watch out for accessories. They changed the housings between Hero2 and Hero3. Round lens to rectangular lens?

 

[GoodEnough]

I bought the basic "Hero" and it works fine.