I've stumbled across a few sealed games in the last few years.  One of them was Fantasy Zone, I believe.  Another might have been Parasol Stars.  Anyway, I open them up right away.  To me, sealed simply means "complete and in great condition".  There is no way I'd ever keep a game sealed.  I don't buy games simply to put on the shelf... well mostly to put on the shelf, but I play everything I own without exception.
Now give me your Tiger Road.  I still need that one.