ohmyprimus just got POTP Predaking in stock... so with about 2 hours to spare, another last minute tax-free purchase.
It ended up being AU$280 with shipping, and if we get it here, I would expect $300-350, as Trypticon was $298 at BigW (on sale for $248), which means at least that for Predaking.
It was worth the risk, as we don't even know if any retailer here (other than ToysRUs who will no longer be stocking it) ended up wanting Predaking... so if we do get it here, at some point it might be on sale for less than what I just paid, but that could be some months away and at least I know I got one, and probably have it in hand within 2 weeks.