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Most blogs have some sort of export functionality. I would imagine that should expedite the process for you. As for fixing the internal links... I would take your export file and use something like Notepad++ to find and replace the old URLs.

There very well could be but I didn't look deep at all. I never even went past the first page of the site. I saw the footer and the phony review and quickly determined the SEO company was using poor techniques to manipulate results, and I would not want to expose a site to those methods.

If you are going for link juice and seo alone, I would say yes.