As a topical example, the Human Test Subject was a craftable object back during the Alien Halloween event, that has been re-released during this event as a premium item with an added xp-multiplier, whereas it had none prior.
Hard to guess which one of the current batch could get that treatment, none of them look quite re-usable for future events unless if they have other scifi or space events. Possible the Hover Car or the Billboard? But probably none.
I remember during the first superheroes I decided to craft a ton of those phone booth because they looked unique enough to get upgraded to premium in the future but instead they were reintroduced as a common item.
Personally I find the retro Townhouses to be the highlight of the crafting process, they look great in urban settings if you want to design your SF, otherwise they can contribute to a housefarm.