Found a copy of Silhouette Mirage that still has the factory seal on it. The shrink is there, but it doesn't appear to be the normal PS1 style with the folded corners. I seem to remember reading this is normal on Working Designs games, but I'm not certain.
I'm debating opening it, but if it's in original shrink I may let it go to someone that's into that and just get a used copy for myself.