@killerchameleon: I hadn't thought about it in a long time...but I had a friend in college that would buy every copy of Mario Bros./Duck Hunt at every Gamestop he would go to (back when they still sold NES games) because they were only 50 cents. He had an entire wall of them (yay StickyTak) in his dorm by the end of our Junior year.
Side Story: The guy also has a King Hippo tattoo.