Yeah I got an RM2 cheap off there and I’m very impressed. It only really does one thing but it does it well. Personally can’t really see any reason I’d need a more powerful one, the latency is great already. Maybe for the front light.

They are quite hackable, but a lot of the mods rely on some funky QT hacking… it’s all a bit kind of undocumented. I was able to get Codex to get full Chromium running in a chroot and render the screen via Xvfb though which was pretty cool and is somewhat usable, so I guess most things are possible with determination

Yes, lots in the $200-$300 range: https://www.ebay.com/sch/i.html?_nkw=remarkable+2

Yeah, koreader is great. As long as you're fine with greyscale, the rm2 size is great for comics and textbooks. Most ereaders are way too small for both.