Well, here is 5 bucks for you.
But there are a few things that would have to be a bit more.
1. what is the os for this thing, windows 10, linux, etc.
Is it a custom os and can it be updated.
Is this os going to be available for pcs to.
Will it be accessible and what screen readers etc will it support or will you make your own.
What devices will it support, wifi bluetooth lan, modem, usb 2 3 3.1 usbc etc, etc.
Could I connect my android or iphone to it.
Could if I chose, run outside the box and load whatever I wanted on it if I didn't want the features it had and do extra things to it.
Could I add external hard drives and stuff.
Could I install aditional hardware in it, hard drive, bigger flash drives, etc.
Could I upgrade the ram, graphics card, etc.
The reason I stopped using note takers in general is while I could run things within them after I learned how to use a computer I realised what was out there, ie games, not just interactive fiction, and surfing the net though you can do that with these devices now days as well as play some games still.
I used to like my old dead dos keynote note taker, if I wanted to I could get out of the system, enter the os and do whatever with it.
I wouldn't mind having a device with a couple boards but I'd like to connect external devices to, braille embossers come to mind, printers obviously via network or usb, hard drives and extra flash storage and probably smart cards and maybe bluetooth speakers.
I'd also like the ability to charge a device off of it while its plugged in.
I'd also like a headphone jack for headphones and standard speakers.
Would this thing have the ability to play cds I know thats not a big thing but I still use it.
Oh and the ability to play audible, epub and pdf, files would be good and daisy books.
Yeah I know its a lot but you will be asked questions on exactly what does what.