[TobiasOhawk]

When I first unlocked my Nine Rogues collection and Elizabeth Swann said something along the lines of "Great riches for completing your collection" I too thought there would be a bonus for completing collections but this isn't the case.

All she really means is you get a small amount of gold (usually between 10 and 100 gold depending on how rare it is) everytime you receive a collection item on top of any gold you get for the actual kill (animals don't drop gold but will give collection items).

As you unlock more collections (8 collections so far) you'll have a better chance of getting an item from each kill and in the process earn more gold.

I'm hoping they will give us small bonuses for completed collections in a future update. In its current state there is no incentive to complete them after you've maxed all land based weapons, bought all the level 15 weapons, bought all the war ships and have reached the gold limit.

By the time I maxed out my land weapons I had completed 7 out of 8 collections and was just 5 pawns short of finishing the Treasure Chess set but all the gold I earned along the way easily paid for all 3 war ships and any weapons I hadn't yet bought.