Actually V3 is no longer free, but M3 and Aiko are still free.  And with the download of Daz Studios you get a really nice set of freebies.  Not to mention the weekly freebie, and i think there is still a content starter pack for free there too.  And not sure but i think you can get V4 for free if you sign up at artzone.  Its Worth checking out to say the least.