30$ max... probably
Don't get me wrong, I'm super excited for this game, but in an age in which I have a huge backlog to complete and I get games for 1$ to 10$, paying 15$ already hurts, and almost never paying more than 25 or 30$ (being those quite rare) I find it hard to justify spending 40 or 50$ in a game. Tho, I MAY if the game proves to be really good and there was no way of getting it cheaper, but then I could also tell myself to wait a year or two and play something from my huge list of unfinished games.
I'm a huge rat when it comes to spending money, it literally causes me pain to do so, probably I'm just from a different culture, and that combines with a lifetime of unemployment with no perspectives of change, and still having my mother paying for my stuff when I'm turning 29 this year. The result is that since I can't earn money, I put all my efforts into spending the least amount of it as possible.
I don't really know for sure how much I would pay, but I hope you find this text useful regardless.