I have a few of these (including my sisters green ipod mini from childhood). Fun devices that make me nostalgic for the era that got me into programming.

Sadly I stopped using them and gravitated back to the smartphone. Thinking about swapping back to a dumb phone though and perhaps the ipod soon

I just restored a 4th-gen monochrome this year, adding a new battery and a SD card adapter to replace the dead hard drive.

It still amazes me how delightfully simple it is. It isn't trying to do anything besides play music well.