I have bought from them and I think you are reading the EBAY notice that is on all vendors pages, it looks they are out of stock on the version you want but the others still say this lowering in the add
I was a able to register both my Mini 5 Pro Fly More Plus and the just plain Mini 5 Pro with the standard battery, both came from Korea. It might be a misprint meaning the opposite that the Plus has to registered. I would ask them what they mean...
I do not believe any of the US sellers are not buying their drones from DJI direct but in fact are doing the same thing that those on this forum have done by buying their inventory from other countries. Someone on another post mentioned their...
Some of those Korean Ebay sellers will in their add say they will cover the tariff fee for US buyers.
I have bought batteries fro US Drone supply with no issues but not a drone