$45 shipped (in the U.S.), and it's yours. Send me a PM.
This was released in 1996 to go along with Saturn Bomberman, which could utilize the multi-tap. This was only released in Japan. It is complete and works. It isn't exactly common on eBay, and when it is, good luck getting it for less than this. I knocked $10 off my original asking price in an older thread.