factory sealed Keio Flying Squadron

[understatement]

I just saw were this game went for $10 less than what I payed and it was only CIB what would the factory seal make it go for?

http://cgi.ebay.com/Keio-Flying-Squadron-for-Sega-CD-rare-JVC-shooter_W0QQitemZ220480003467QQcmdZViewItemQQptZUS _Vintage_Video_Games?hash=item3355a1dd8b&_trksid=p3286.c0.m14

http://img241.imageshack.us/img241/574/dscn0453.jpg

[Dark_Sol]

Last copy went for about 270$ if i'm correct.