The spare probe droids can always be used to fill out an Imperial diorama. With the Wampas? If my Hoth diorama gets to any sort of size beyond the scenes from TESB, I might make the infamous "Wampa room" that C-3PO pulled down the sign from, and use the old Wampas for that.
But then I look at old vehicles, and who really wants to display the old style X-wing compared with the upsized version that was first offered around 2002? The same goes for A LOT of POTF2 era figures. I am just at a loss about what to do with some of them because I really don't want to display about 80% of them unless it's the only rendition of a character.