Druk

I just started looking through all the Collectible Minifig Series stuff, and I guess a lot of the price must be based more on rarity instead of straight coolness, so that's kinda nice for me since I don't plan on keeping my collection on a shelf. I don't mean to make this question only about the Series minifigs, though. What are some really cool minifigs that you think are currently at a better price than you think they maybe should be?