I just pre-ordered the Optimus/Convoy set.
As noted on our facebook page, the price here is actually quite close to the Japanese retail price without shipping, so even if you bought this from an online store or through someone from TakaraTomyMall (who doesn't ship outside of Japan), our price here is going to be way less (which is a refreshing change from the ToysRUs era).
I do want to note that these are significantly expensive in Japan, so having AU$80 for each Voyager sized toy is intentional, as these are a limited run of special anniversary packaging (and probably some minor deco differences to the actual toys), for those like me who intend to keep these sealed for display, as I already have these two moulds, and don't need to "play" with these two.