Can I move / migrate pages from a subsite to the main site within multisite?

Hi,

I would like to convert a multisite install to a single installation. Before that I would like to move / migrate all pages on subsites (2) to the main site. What is the best way to do so?

I don't have comments or blog pages yet but the number of pages is huge, so I'm looking for an automated way to do it. Some users here recommended backupbuddy but I don't know how does it fit in this cause as far as my experience it migrates to an empty site.

Thanks