Some of the Japanese versions are less rare than their North American counterparts. Jack Bros and Virtual Tetris are two fine examples of imports that are actually cheaper to own than the American versions. If you hate paying high dollar as much as I do, it's the way to go. Unfortunately, Insmouse and Space Invaders will probably command ridiculous prices into the future just based on ridiculous scarcity. Does anyone know how many of those carts were actually pressed?
Good luck to everybody on finding their want lists.