The Nook Simple Touch is available used on eBay for $10-$20, and jailbreaks easily from the default shell to reveal a stripped down old version of Android, with browser and other pieces.
I used a custom Android app on my Nook build - https://shkspr.mobi/blog/2020/02/turn-an-old-ereader-into-an... - that's the only way I could get information to display on it.