The non-canon, Metroid-spinoff, manga, Samus & Joey, volumes 1-3 are now available in digital eBook format. They are still in Japanese-Only but they are also just a fraction of the price that the second hand market is asking for them. Also, with enough interest in these digital editions, the possibilities of a physical release for Samus & Joey EX (the final volume) increase. You can view a free sample of the eBook courtesy of Amazon Japan.
Samus & Joey’s illustrator and writer, Idzuki Kōji tweeted:
After 20 years, “Metroid Sam's & Joy”, a manga based on the Nintendo’s game Metroid, is finally back in e-book. If you're interested in “Metroid Dread”, released last year, you can see cool Samus.
Please have a look.#Metroid #SamusAran pic.twitter.com/KoMuaPnOJN
— 出月こーじ (@moonup777) January 30, 2022
The Metroid Database has all volumes of the manga translated to english and available to read for free.