For your consideration, a Logitech Transporter (Black) WITH the "TransNav knob". Only a few hours of use! Factory reset already done. Not only does this have the original manual and remote (never used, still in its original plastic bag) but it also comes with what was a fantastic and not well-known upgrade to the Logitech Duet Music Controller, which is a remote with an LCD screen that makes it super easy to navigate the music, see cover art, etc. Also has original external antennae and original high-quality power cord.
This really is one of the great early AUDIOPHILE digital music systems and it's still great for most people's uses if you store your music on a networked computer. It also has some streaming functionality...you'll have to do your own homework on that. It's quite a customizable unit...again, do some reading up.
User's manual for the Transporter: https://www.logitech.com/images/pdf/userguides/eng/Logitech_Transporter-ENG.pdf
More on the remote here: http://wiki.slimdevices.com/index.php/Controller_User_Interface
You can also control it from an iPhone or iPad app called iPeng. (Not sure if it's also on Android...might be.)
Anyway, if you're looking at this you probably already know what you're looking for, and this one is not only in PERFECT condition but comes with the fairly rare upgrade remote (that I think cost me over $200 at the time).
In case you're wondering why it only has a few hours of use, it's because I had a prior Transporter which had an issue after years of use and convinced Logitech to send me a replacement for free, and then we moved shortly thereafter and this has been in the box since then.