@Tony556 Now, I don't wanna sound like a jerk. But it's a little suspicious to me that 5 of your 7 posts are about trying to sell headers. Like that's the only reason you joined the website. And your very first post from June 2nd implies that you don't even really know what you're doing to extract or patch the header and that you were possibly going to take them from your friends. It seems fishy to me is all I'm saying. I would at least build a reputation on the website and gain some knowledge about the subject before trying to simply sell the headers. And what are you charging any way? You're not supposed to do this to make a profit.
Edit and I see an inconsistency within your post history. In one you imply that you have done this before and destroy the cart "I just threw mine against the wall until the case started to loosen, then I ripped it out and cut the board up a bit."
Yet in a post just before that you say, "I can't dump my own ROMS because I don't have a Gateway/Gateway-compatible device." So... You destroyed your friend's game?