I think they do relax you, although they are not what i would say a
proper massage.They are good for getting some oil into your dried
out skin
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.As far as prices are concerned they range from 200 rps to 600rps and have found they will barter. If they have not had much work.
they normally last about an hour.If you have 2 a week we pay 250 each.
session each.You might have to try several until you are happy with one of them.Some are rubbish and can hurt you.Recomendations are best bet.
They are also some of the best paid workers on the beach.