Also underrated are Pillage and City. All 3 of these cards have the ability to (at least reasonably often) completely dominate the board to the point where the whole game revolves around them, and this attribute keeps them in the top half of the $5 cards in my book.
I'm kind of sitting on the fence with City. My first impression was it should be lower because often it's just a VERY expensive village. But then again if there's a nice engine on the board and the only thing you need to make it work is a village, then you won't mind too much whether it's expensive or not.
And on the other hand there are those boards where it completely dominates.
So overall I guess I'm fine with where it's sitting at.