A 3D mouse like
https://3dconnexion.com/nl/product/spacemouse-wireless/
is really nice if you need it. It's basically a 6 degree of freedom input - you can move in x-y, up and down, tilt it or rotate it. Even for working in 2D it's useful. And it's a bit more ergonomic than a mouse as well.
It's basically the controls of microscope with a USB cable. So that people who are used to working with a microscope can continue to work the same way.
These are the only 2 lesser-known accessories, I used. Not sure why everyone needs to talk about mice and usb hubs here
But yeah pricing is based on value not cost I guess. People who need it (architects, 3d designers, mechanical engineers) often have high end workstations so price of the mouse is a rounding error (and like 1 hour of their salary?)
I've also tried this weird mouse replacement: https://www.marzhauser.com/en/products/operating-devices/erg...
It's basically the controls of microscope with a USB cable. So that people who are used to working with a microscope can continue to work the same way.
These are the only 2 lesser-known accessories, I used. Not sure why everyone needs to talk about mice and usb hubs here