People always say this but where would you go to find such a buyer? If you could find someone who would purchase it from you, would you process to then sell it

People always say this but where would you go to find such a buyer? If you could find someone who would purchase it from you, would you process to then sell it to them? If you can't find a buyer and/or would most likely be unwilling to commit a crime, it's a moot point.