So decided to spontaneously upgrade my phone yesterday and got a Nexus 6P for 340$ on Kijiji, then decided that even though my Nexus 6 has 2 cracks, won't take screenshots until the fourth or fifth try, and can't be used while on a call, it still works and really doesn't need to be replaced, so I sold my new Nexus 6P today 30 hours after buying it for 440$ making a 100$ profit.
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Get this
https://www.amazon.com/Ballistic-Maxx-Case-Nexus-Packaging/dp/B00GRJ561G
Never a crack or scratch again
(although that one is for the nexus 5, there is probably also a nexus 6P version)