Very nice site you have. I've tried to make a forum for video game collectors but it seems the ratio for people collecting the games to people actually playing the games is around 1:100 so my forum isn't very popular I guessOh well good luck with it its off to a great start.
As for collecting sealed games, think of it as an investment. Like someone else said buy a sealed mario RPG for $200 and then buy the cart for $30. Keep both, play the cart, and watch the value of your sealed copy grow in value. Tell you what, I'd have $20,000 in a collection of sealed classic games rather than in the stock market any day of the week.