I still don't understand who these are actually for but 'G1 toy prototype Unicron ReAction figure' is not something I expected to be a thing.
I understand the appeal of these things in general, having a small collection of retro-looking, aesthetically cohesive, universally-sized figures. And if they were like, $5 or so, I would probably have picked up a couple. But if I can get a larger, fully transforming figure for the same (or similar) price that works in my existing collection, I'm gonna do that.
But this Unicron, THIS is what would make me buy these. Crazy, off-the-wall stuff that we would never get as actual Transformers. The Optimus and Megatron and Soundwave and such, those are for the general pop-culture collector that wants to have some Transformers in with their retro action figure collection. Prototype Unicron is for us.