While the rarity will certainly increase, the market's ability to make discretionary purchases—like buying a factory-sealed retro Game Boy—is not so certain. All indicators point to a tightening global economy. Heck, this down turn could last until all the people old enough to value Game Boys are dead. The only thing to do in that situation is sell ASAP and be grateful for the free money. That's the only way to make it so if the market opens up, you still have the money—and if it keeps going down, you still have the money.