Wow, I had no idea that game was that rare. I got my copy in Okinawa for like 2000 yen brand new back in early 2004. Now that I think about it, I don't remember ever seeing any copies other than the one I bought. I think eBay's your best bet. Most reliable online retail places don't have much in the way of DC stuff anymore and frankly I wouldn't trust most places that say they do.