I just got in the mail a copy of Space Berserker for the Laseractive MegaLD. It's complete and sort-of or almost sealed, but not quite - the original plastic (with Pioneer's stock sticker on the front) is slit most of the way down the side with the disc, but with just barely enough left that it's not possible for the disc to have ever come out.
Is this worth any more than an open copy? I have to admit I'm getting sorely tempted to slit it open the rest of the way and play it, and for what I paid I'd not be disappointed about losing a "sealed" copy, but since it's an R7 game I figured I'd see if it would be considered a serious sacrilege.