flametitan
Explorer
Now I'm imagining a "trade nexus" which is really just a 60' radius area in which animated skeletons wait, clutching packages, until a wizard casts Teleportation Circle. At that point, they all begin a perfectly-choreographed movement which is designed to let every skeleton in the area Dash through the portal before it closes. I suppose you could even extend the radius even further by having some skeletons grapple and drag other skeletons closer, and some skeletons riding mounts for the extra movement speed. (If your mount Dashes for 120', you can spend 15' of movement getting off and then Dash yourself for another 45' for a total of 165'. BTW, in theory you could move a total of 800' in a round this way by leveraging three separate Phantom Steeds plus a bonus action Dash via Expeditious Retreat. But, like the skeleton markets, it's rules-lawyery and more than a bit ridiculous.)
If you want to go even more silly, you just have lines and lines of peasants along the countryside (a la the peasant railgun) who've readied their action so that as soon as they get the parcel, they hand it to the next person. Now you have shipments travelling across continents in six seconds. It was a revelation I've heard from a podcast talking about wanting to play a world where RAW defined the laws of physics, and how RAW doesn't allow for the Peasant railgun, but does allow for instant transport.
I've taken to dubbing it the "Peasant Amazon."