I have a minty sealed copy of Darkwing Duck that I've been hanging on to until I'm ready to shoot a video opening it up along with many more grade-able items. After I got it, I raffled off my loose copy.
So collectards/resellers will rejoice that I plan to increase the rarity of sealed copies plus by not treating it as an investment, it will remain outside of market circulation, further increasing rarity of complete and loose copies.
Of course, from a game-playing buyer' perspective, this just means that you can get the game for as little as free. But that never figures into pricecharting.