All the Hasbro Pokemon plushes I was waiting on last post have arrived, but to answer my own question of where I was gonna go next: I came across Staryu and Blastoise, two very rare later releases, at fairly low prices from two different UK sellers. Those are the kinds of opportunities that you don't walk away from unless you want to live in regret.
(Not quite "buying", but sometime before Staryu arrived, I got Mom to snag me three more Hasbro beanies for my birthday stash: Togepi, Gyarados, and Pidgeotto. The latter-most is another rarity inbound from the UK.)
I am now waiting on a full set of Sailor Moon "Sofvi Puppet Mascots" (i.e. vinyl figurines), featuring the girls in their royal attire. Mom also helped me win an eBay auction for Irwin's Sailor Chibi Moon plush; I can't say that sub-collection is now "complete", as I'm still missing Tuxedo Mask and the cats, but she was the last Sailor Guardian I needed.