looking for a 7/8 inch ebook reader

Hello, I am looking for a 7 or 8 inch e reader which supports KOreader. I dont have to big expectations, it should just have a Touchscreen and preferably wifi so I can wirelessly transfer books to it. I currently use an old kobo aura, and ereaders based on Linux are pretty interesting to me, but i also dont really care if the device runs Android. Also, I would like to stay und er my budget if 250€