This Unit currently doesn’t have the macOS installed, therefore I’m not able to obtain any information regarding the specification of the unit. All I’ve done is booted it up and taking the attached photo. Check the pictures for a close-up of the serial number maybe is possible to retain some more information that way. You will be taking a punt on this item as it is being sold as seen as parts not working because it isn’t tested any further than the photo taken. If this still sounds of interest to you, we’d be happy to ship it out please allow five working days.  When I plugged in a keyboard in Morris and obviously the HDMI, they all worked.
eBay