It is heartwarming to see others repair what can be replaced in this disposable society. As others here have said, with most of our "toys" the cost of repairing is is more expensive than buying a new one, they get tossed out.
Especially with electronics, used to be one could see electronic repair shops in every town/city most of them were radio/tv repair shops. With the drop in prices for our electronics, the cost of parts and labor usually was more than a new one was. So out the door and into the landfill it went.
Good job on breathing new life in your kindle.