Praise be to Allah.
We appreciate your keenness and your cautious approach, and your eagerness to make sure that your earnings are halaal. We ask Allah to bless you and grant you provision from His bounty.
Referring to the conditions that are stipulated by Google in offering the blog hosting service, it is clear that they affirm that the content of the blog belongs to the blogger, along with whatever patents, trademarks and copyright may be applicable. This means that it is permissible to sell the content.
It says in their terms and conditions:
“6. Intellectual property rights: Google’s intellectual property rights. You affirm that Google owns all rights, the right of ownership, use of the service and so on, including all intellectual property rights (“Google’s rights”). Google’s rights are protected under the laws of the United States and international laws pertaining to intellectual property. Therefore you agree that you will not copy, reproduce, change, or modify the service, or create derivative works. You also agree that you will never use any internet bots, web crawlers, or other automated or manual system to watch over content or obtain a copy of the service. As explained below, Google’s rights do not include content uploaded by the user of the Service, including the content of communications that may reach or appear on the Service.
“Intellectual property rights: Google does not make any claim to own or have any authority over content you upload, store or send through the Service. Therefore you (or anyone you permit, as appropriate) retain ownership of all patents, trademarks and copyright to any content you upload, store or send, on or via Google Services, and you bear the responsibility of protecting these rights as appropriate.”
We understand from this that the service that one is not allowed to sell or copy is the program or software used to run the blog. As for the content, it belongs to the blogger.
If the purchaser understands that the blog is basically free and belongs to Google, then in fact he is buying what is in the blog of work, content, trade names and so on, and what results from that of fame and attracting visitors. These things belong to the blogger, and it is permissible for him to sell them.
Based on that, there is nothing wrong with selling the two blogs and selling similar things which contain material that offers an incentive to buy the blog; in fact what is being sold is the content.
And Allah knows best.