Click the link for the prices in your currency, might be a bit different on EU, because of taxes: (EU is 8.45% cheaper for my currency, based on the Poltava Admiral Pack).
We already have the offer in EU:
See the discount percentages here:
No special sales on premium time/doubloons.
Also, the armory have some interesting deals, like a one time buy of a premium container or 5000 coal for a few doubloons: