My K3 will be a year old in November. My K4 I got on the 6th of this month. My K4 is my main reader now so I voted less then a year old.
Both of my Kindles are still in perfect condition. No Flaws.
I just sold a Astak Pocket Pro that I got 3/10 and it was still running just fine.

Just has small wrinkles on the right side of it by the screen other then that it worked like it should.