As a game developer, I'm using my old phones + the old phones my friends give me
to test my games on.
I currently got 6 phones laying around.
And getting another one soon from my father when he gets his new phone.
I usually sell them on gazelle. Com but I have the nexus 6 now and possible getting the next nexus in February so I will keep my nexus 6 2014 as a backup...