Sure you can buy it, you just have to find it on the site 
. Not easy though. Here in Canada - not sure if the site changes were propagated to elsewhere on the planet - I first go to claris.com. Now I make sure that the page is scroll all the way to the top, because this will not be displayed:
Click on Discover how >. then scroll to the bottom - I told you it would not be easy:
It has been there since Platform Bundle has been announced. My guess is that your are looking for something else, the free offer for a single license that does not let you share what you create. No words on this yet. Maybe that will be announced in the next presentation on September 13th.