Collectors should stop worrying about "sealed" and start treating them like coin or card enthusiast do. Find ways to preserve them instead of worrying about the originality of the shrink wrap.
Game collecting could borrow alot of good examples from coins and cards. Preservation, grading, etc. And when I say grading I'm not talking about sticking games in sealed slabs. I'm talking about a consistent way to describe their condition. The 1-10 rarity scale seems to be generally accepted. What about a 1-10 condition scale? R=7 C=8 is more descriptive than R=7 alone. Sure people would disagree on whether specific games are C8 or C7 but the common language would be useful. Atari2600 . com uses a scale like that.
I did take a look at StrategyWiki and I like the concept. Some of the Atari Age game pages still need fleshing out, but the open editing format of your site would make contributing easier I suppose.