Surf Cam

Hey guys,
Not sure were to put the question sorry if it is on the wrong forum section.
I'm thinking of buying a waterproof camera to take on my surf sessions, so I can film myself and my friends surfing. Any advices on what the best price/quality cameras are there outhere???
I already know about the gopro4, but it's way too expensive for my budget (it costs around 500dollars here in portugal same as the minimum wage lol)
any advices on cool lower prices camera would be very appreciatted...
Thanks.
Not sure were to put the question sorry if it is on the wrong forum section.
I'm thinking of buying a waterproof camera to take on my surf sessions, so I can film myself and my friends surfing. Any advices on what the best price/quality cameras are there outhere???
I already know about the gopro4, but it's way too expensive for my budget (it costs around 500dollars here in portugal same as the minimum wage lol)

Thanks.