Edit: After reattempting, this is not replicable
Apologies on the lack of visual context, but I’m hoping my text description works well enough. While overseas but specifically not flying, you’re able to send items. This means someone with enough money can buy as many of an item they can hold, then send them to someone in torn, and rebuy without re-flying. This allows one person abroad and one back in torn to empty an entire stock.