Snake, I have no quams with you selling your hardware, but you should at least tell the guy of other (cheaper) options. You know what I'm talking about because you tried to do this to another newbie. You should sell your MGCD box on ebay, and not to newbie people who are only coming here for help.
You can take a standard $15 dreamcast VGA box, and hack it (by simply cutting one wire inside the vga box) to output to an arcade monitor. Its just that simple.
-Dave