The Kindle Oasis is lovely, but $200 is too pricey for an e-reader. The Kindle Paperwhite is the one I recommend and 35% off today at Amazon, bringing the price down to $85. This is a great deal and maybe signals imminent new products, but it's not as if "basic decent e-reader" is a category vulnerable to disruptive innovation in 2020. The Paperwhite has high-dpi text, subtle backlighting and weeks of battery life, and that's probably all you need.
35% off Kindle Paperwhite [Amazon]