Help me, /toy/.

I'm in the UK and although I collect Transformers, I have a habit of only collecting the ones I really like the look of, no more and no less, no matter what range they're from.
Anyhu, my next desire is the TF:A Shockwave, Voyager class. I've looked about and eBay only has unboxed figures.

Where could I look to try and obtain this figure, unopened in box etc? Or is that unlikely to happen yet?

Pic related.