After reading the review and feedback this looks as though it's probably one of the better games on the market to represent the age of sail, however, after looking further into I can't in good conscious find myself investing in Oak & Iron (OI from here on).
The cost of the game along with the cost of additional ships results in a game that simply prices itself out of the market. Now please bear in mind that I am a UK resident which will inevitably impact my view of this but to use Black Seas (BS from here on) as an easy comparison the core set for BS is ??50 straight from Warlord Games but can be found for ??40 - ??45 from your FLGS. In contrast to this the core set for OI averages in at ??65 with significantly worse availability.
These prices don't even take into consideration the actual contents of the starter sets or the cost of adding to these. The point at which you start expanding upon the core sets is where the disparity grows exponentially with the content to expense ratio favouring BS significantly.
While I would love to look into pursuing OI, as it appears to be the superior game and system, it simply isn't worth the cost. I sincerely hope that it develops a strong following but this is one game which I cannot see gaining traction in the UK.
I guess my search for an Age of Sail game continues.