The value of a used likely obsolete commercial 3d printer is a bit of an open question .
Likely the hardware and software are proprietary ..
The local maker space I purchased a staysis u print like 3 years ago. one the service contract expires it became basically a n expensive boat anchor yes it has value . It sits in my garage as I am hoping to retrofit with open sourced hardware and software.
the value comes in what price the buyer and seller agree upon
and as noted logistics come into play as the units are sometimes large and heavy .
Kind of like a car a lot depends on condition and usability. there are many values auction wholesale dealer private sale and full retail.
Soliddoodle 4 stock w glass bed------Folger Tech Prusa 2020 upgraded to and titan /aero extruder mirror bed
FT5 with titan/ E3D Aero------MP mini select w glass bed
MP Utimate maker pro-W bondtech extruder
Marlin/Repetier Host/ Slic3r and Cura