Cheaper stylus options for the Kobo eInk readers

I have a Kobo Elipsa 2E (came with a stylus) and I’m thinking about adding a Libra Colour, which also supports a stylus. (My Libra 2 does not; the other models that do are the discontinued Sage and the original Elipsa.) I want to be able to easily highlight text, and add notes.

The official stylus is $70, but, it turns out it uses the Microsoft Pen Protocol (MPP), so any stylus that works with a modern Microsoft Surface tablet should work with the Kobo. Like this $20 unit (or this $29 model). (The former can be equipped with these replacement nibs; not sure about the latter.) The $20 SKU, Amazon’s AI said it wouldn’t work, but multiple reviews said it works just fine (search for “Kobo” and use the “Show related customer reviews and Q&A” option); for the $29 product, Amazon’s AI offers:

Yes, the ASUS Stylus Pen you're looking at works with Kobo devices! One customer specifically mentions it "works well with Kobo devices" in their review.

Key features for Kobo use:

• MPP 2.0 technology - compatible with Kobo Sage and Elipsa models
• 4096 pressure levels for natural writing feel
• Excellent battery life - customers report it lasts months between charges
• No setup required - works immediately upon contact

At $28.99, it's a great value alternative to the official Kobo stylus while offering the same core functionality.

Other options might include the Metapen Stylus Pen M1 ($28) or the RENAISSER Raphael N520C ($32;  lacks a magnet for attachment, FWIW). Developing...