The more they sell, the more common they become, the less they are worth.
OH Man! I grew up with the Atari 2600. I must have had almost every game. Then, I had the short lived Atari 5200, which boasted arcade graphics. It had all the top titles super breakout, centipede, dig-dug, Congo bongo, Defender. Loved it.
Don't you mean why, why, O WHY! Aghhhh make it go away!