ONZO

"The scroll ball emits a sound when it is being rolled, but this sound is not a product of the actual hardware. The sound is actually played back from a tiny speaker within the mouse itself. Unplugging the mouse will thus mute the scroll ball (although the mouse will, of course, be unusable when unplugged)." - Wikipedia

This blew my mind. The Apple Mighty Mouse has such a classic clicking scroll noise.

"The scroll ball emits a sound when it is being rolled, but this sound is not a product of the actual hardware. The sound is actually played back from a tiny speaker within the mouse itself. Unplugging the mouse will thus mute the scroll ball (although the mouse will, of course, be unusable when unplugged)." - Wikipedia

This blew my mind. The Apple Mighty Mouse has such a classic clicking scroll noise.