This has now been changed. I've updated the blog accordingly. The new prices are as follow:

Maul Handle - 15 Points
Ring of Wealth Scroll - 5 Points
Magic Shortbow Scroll - 5 Points
Clue Box - 5 Points

whathaveidonetwice

Was the 400 a typo? Or intentional, just overlooked?

I'm not entirely sure as I wasn't on this week's game update or the process. I'd imagine it was just overlooked but luckily it was able to be changed without having to reboot the worlds.