Buy this extremely exclusive deal of Expired Tumblr Blogs.
You get 1 Expired Tumblr Blog whose Domain Authority would be between 0 to 10.
Domain Authority, as you know, is a metric used by Moz to determine the Ranking Potential and Link Juice a Website can provide to your Money Site.
Expired Tumblr Blogs can be used as your own Private Blog Network.
( Beware of all the sellers who sell expired Tumblr at cheap rate.
Most of them make JUNK links to it themselves and sell it.
Those Tumblr Accounts are very harmful for your Money Site and is not safe from Google updates in the long run. )