I love the X series but I can't seem to find the 4th game anywhere. I'd be willing to trade some of the games I have, I have Megaman Battle Network 1-5 and both versions of them for the ones like 4 & 5, both Goldensun games, Majora's Mask and Ocarina of Time Master Quest, though since the last two are available on the site itself I'm not sure if anyone would want those in a trade. I have quite a few others on GBA, NES, SNES, and N64 as well so if there's one in particular you'd like to trade for it I'll see if I have it.