Try again, Validus. That's from the US release; the rest of the class is talking about the PCE version.
It's not a horrible price, especially for ebay. Like Tatsujin said, Dungeon Explorer II is usually on the pricey side for PCE games and Macross Eternal Love Song usually goes for $25 or so. You'd likely be able to pick 'em all up seperately and spend less, but any savings would get eaten up by paying to ship 'em all seperately.