Hey would partially or completely burying this container help keep the temperature in check? I remember seeing a diagram for a modular aquaponics farming setup built outta a container similar to this one. And they buried it to keep their temperatures with in the desired range.
Edit. Sorry for going a bit off-topic, Good luck with your sale!
Burying this would improve the insulation factor of the container. However, mining is massive heat generation and removal, so the extra insulation would not be beneficial. It could be helpful to keep the temp in check for aquaponics or something in a more "normal" temperature range.