So I plan on picking up the original Rum and Bones in the next week or so. I know there are some expansions that I see on Amazon - but I am confused.

1. I see wildly varying priced for "Rum & Bones Mazus Dreadful Curse Board Game" and "Rum & Bones La Brise Sanguine Board Game".
Multiple listings for regular price and a few for 100+. Did these expansions go Out of Print or is Amazon being dumb?

2. I see both an expansion "Board Game" and "Hero Sets".
It looks like the expansion "board games" actually have more Heros? (On top of the tide cards, etc).