Quite possibly one of the final updates!
Sending out Jack's package tomorrow. He has been the pinnacle of patience, but it did help to let everything else die down so I could deal with his requests more directly, which is something he and I discussed at the conclusion of the sale.
Everyone else should have their things by now, but I can't confirm everything until someone either leaves feedback or contacts me. Even by media mail standards, all people should have their stuff by now, with the potential exception of Bragarb, since I don't know how long it takes stuff to get to Argentina. But given the relative speed my Canadian friends showcased, I imagine he's got his stuff by now.
EarthboundX5: I still cannot find the GC battery screws. I will look one more time, but I've turned this room upside down at least three times, and it's been cleaned as well in the interim. So I don't know what you think about that.
Otherwise, if anyone else needs anything, please contact me.
Thanks again everyone!