I bought a used Note Air 3C from the official Boox eBay store for $419. I've only had it for a few hours now, and so far it's doing everything I wish my Kindle Scribe could do:
- It treats PDFs as first-class citizens. I can rename PDFs. I get book covers for them.
- I can load files right from cloud services like Dropbox, OneDrive and a ton of other services
- Any drawing and scribbling I make on the PDF show up in my Dropbox account and are objects in the PDF I can easily delete.
- Annotations show up in my Dropbox account.
- I can increase storage by adding a microSD card
This thing has a TON of features. It's going to take me a ton of time to figure this out and set it up the way I want.