Why does it have to be an iPhone 6? I'm happy with my iPhone 4. Just get a good case and you will be fine. I have a Lifeproof case and it is amazing. I've dropped my phone a hundred times and not one sign of damage. I've also gotten it wet before (the case protects from that too apparently).
I have to agree with kmjt , my iphone 4s works really great and for the price its really worth it, a good camera, a good shape, and the quality of the pictures and videos is amazing for me. Test it out,i really recommend it.

