The Kindle lineup has long been among the best e-book readers on the market. Amazon recently updated its entire Kindle lineup, and while that hasn’t turned out any new Kindle deals yet, there are some ways to save on both new models and old. You can save 20% on brand new Kindles if you have an eligible device to trade in, which creates for some significant price drops. We’ve pieced together all of the information you need in order to save on a brand new Kindle or on some older…