I'm selling my complete, fully functional Helios64 bundle as well. Unfortunately, I don't have time to take care of the NAS properly.
Here a link to the German ebay-Kleinanzeigen (english description below): https://www.ebay-kleinanzeigen.de/s-anzeige/kobol-helios64-arm-open-source-nas/1989458235-168-8929
I'm open to send it to abroad on your own costs.
Cheers,
Simón