by lostphd
After my initial reply, I checked the rules and edited my post. You can see the edited post further up in the thread.To summarize: The rule which says that sold ships should be placed back on the stacks is illogical. A ship can only be built or bought once. It should be sold to the town, and not back to the stack.
If this is done, the situation you outline can have no effect on game play, as all ships would still be available to be bought by Player-A.
He would logically buy the ship with the highest franc value.
This is just an interpretation - there is nothing in the rules which covers the eventuality of more than one player selling a ship to pay interest in the interest phase. A fascinating loophole which I am glad you pointed out.