Posted Sat Oct 23, 2010 8:06 AM
It's really not that rare. The price went up because Nintendo discontinued it. That means in the short term, the price will be inflated. Over time as something else has replaced the Wii, it may not hold its value. It will probably fluctuate as demand increases/decreases. Some of the Game Cube games such as that Zelda collection or Metal Gear Sold 2, The Twin Snakes fetched a decent price a year ago, but their value has dropped off quite a bit. It's likely the demand is not quite that high right now.
Of course, the value of something like the Metroid Prime Trilogy and the games I mentioned goes up considerably if the game is still sealed.