Ico: http://www.vgchartz.com/games/game.php?id=7198 (Doesn't have any number's but sounds to be a very popular game, and was also mentioned in Sony's E3 Press confrence as being a popular game)
and
Shadow of the Colossus: http://www.vgchartz.com/games/game.php?id=7100 (it's at 730K in Japan, Definitely sold 270K in america and Others)