I have tried selling it but people only want the display and will pay only the fraction of the price.

I have also wanted to donate it to people in need but I think a smart phone would serve a better purpose.

Interesting use. Unfortunately I haven't found any usage like that. Maybe a home automation system and an Arduino interface?

If you have got a Nvidia video card and you want to use it, use X11. Other than that use Wayland unless you encounter any bug or incompatibility.

Wayland is more modern and actively receives updates and features.