If you’re currently searching for a Kindle e-reader to buy, the best one for your money is the Kindle Oasis. Normally, that wouldn’t be the case, since they cost $250 new, but Woot has the 2018 version (the previous generation) available refurbished starting at $100. That price will get you the 8GB version with Wi-Fi support. Though, if you want 32GB of storage and cellular connectivity, the step-up model costs $140, which isn’t a bad price. Currently, Woot has the graphite color of both models in “very good” condition, and they’re covered by a 90-day warranty.
As for why you might want the Oasis over the Paperwhite, it has a higher-resolution display (but the same pixel density as the Paperwhite), and it has more front LEDs that make the screen look more naturally lit. In terms of design, the Oasis might get the edge because of its side grip that has a few touch-sensitive buttons. My colleague Chaim Gartenberg says that they make the Oasis feel more like holding an actual book.