At any point of time, there is only a limited number of Expired Tumblr Account available.
It takes real talent to acquire an expired tumblr web 2.0 blog with Domain Authority 30 – 40.
You are bound to see significant search ranking improvement within next 6 months. ( Yes, SEO takes time )
I will personally guide you to setup your expired tumblr web 2.0 so that you can get the maximum out of it.
( 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. )