Too Many Bones is running $250 on Amazon. For that you can get all of the Mansions of Madness material.
I bought direct from Chip Theory. Although I think stock was limited so they might be sold out right now hence the gouging.
And it did deliver today (finally,) so I will give it a go tonight.
As did I, right before they previously sold out.
I suppose repeatedly selling out of stock is a good indicator of it's popularity. Their last Kickstarter, for the randomized end boss creator, raked in a pretty huge amount. Included Core reprints of course.
Think I liked it most due to the wide variety of player powers. Even though the core game mechanics aren't very difficult, despite the somewhat disorganized bits of the rulebook, each character still has it's own play style and varied level-up build options. Seems like you could play the same character (yes, solitaire character is possible) multiple times and end up with a different build focus every time. Plus all the powers largely being tied to the custom dice is great, so if you like dice-chucking and character building a bit like an action-RPG, then it's worth a look. Even at the cost for the big Core game.