I am trying to write my first story and I'm having trouble imagining goods that would need a military convoy (included private) if they were to be transferred safely on a non-at-war soil. It doesn't matter how shiny the goods are, as long they have a big value on the black market. 

Gold is used a lot in fiction, but it looks like it's not actually transferred a lot IRL, not in large enough quantities that would require a military escort. Collection of antiquities, maybe? Art? Expensive cars? Weapons probably get transferred a lot but that won't fit my story, as the goods will be eventually stolen, and thieves should be just thieves, not mass murderers.

(Edit) With military convoy I mean something alongside of: 10-20 armored trucks (medium/large) "shielding" the goods. Tanks would be cool but that would probably narrow down my choices a lot. Combat helicopters, at least 4. A unit of soldiers of 50-100 people.

Thank you in advance.