I can see someone pay for $30 / post from normal blog. But just for $5 for ezineaticles.com post with two links. How much Ezinearticles link value?
if you have to decide on a blogpost on a 3rd party site and an ezine article, ezine would be my pick as most of the blogposts you will buy are worthless unless you buy it on an established site with good ranking itself. often you will buy blogposts just to see that your individual post didnt even get indexed by google as googlebot hardly ever visits that blog. besides, you will most likely get more traffic on your ezine article than on the blogpost you pay $30 for
got link from Ezine will be good because people will find articles there. Beside that, it will be indexed by google, so it is worth to submit there