$20,000 for a new MIB mint-seal sealed Gold Youkai Douchuki.
Add another $30,000 if it's VGA graded 7+.
Make it an even $100,000 if it's a VGA 10.0.
If it's signed by a member of the development team, $2000 tops. What a waste of perfectly good sealed collectible.
If it's used/open, I won't buy it for any price, because I only collect complete sets of graded sealed games.*
If I am not allowed to let anyone know that I have it, that's a deal breaker too. Otherwise, what's the point of collecting?
*The only exception I make is for rare unreleased prototypes that nobody else has, like PC Cocoron. If it's a game PCE fans would want to play and it's the only copy in existence, then I will pay any price to have it exclusively to myself and will make sute it never gets ripprd, copied, etc as long as I live. Otherwise, what's the point of obtaining and ultra exclusive game unless I get to hold it over the heads of other people?