TBH, I can't really think of a market for this that isn't contraband. The "last mile" looks really annoying as well.
Edit: I think it's a legit marketing question for OP. Name three different kinds of item someone might want to use this service for.
I'll even give you one: there's already a small cottage industry of reshipping companies from e.g. Japan, who will let you buy stuff from companies that won't themselves do international shipping. Ship to re-shipper, who then handles the international part.
You might be able to get a market started if your model starts with only items bought from legitimate retailers. Effectively a really long distance doordash.
I had a large, bulky, and fragile package I needed to send to Florida from New Jersey. The shipping corps were happy to do it for me for $500+, and no guarantee that it wouldn't arrive as a box of shattered glass.
I ended up finding someone in town who happened to be driving there, and was kind enough to deliver it for me. They still offer no such guarantee, but they also were kind enough not to charge me for this!
Sure, but like open source, the dynamics are different when it's a favor without money changing hands. OP's market would want compensation, and then inevitably someone has to deal with the "my package arrived as a pile of shattered glass" claims.
Internationally if it's P2P rather than P2companythatdoesthecustomspaperwork it's pretty much pure smuggling-as-a-service, and yes, people who kindly help carry the stranger's Colombian souvenir on their passenger flight for a small fraction of the ticket cost will find themselves being jailed at the other end.
A key element is that the passenger was contracting out their baggage allowance and so didn't ever interact with the items - they never even saw it. So no liability.
They've already created a FedEx and an Amazon for high value drugs. They're called FedEx[0] and Amazon[1].
[0]: https://qz.com/1627572/drug-traffickers-favorite-way-to-move...
[1]: https://www.nytimes.com/2026/03/21/world/deadly-drugs-paper....