I'm fine with where the old blogs are. Whatever you end up doing, please do not remove them.

Marco raised a good point though and perhaps you could -instead of reposting- make one post that has links to all the old posts.
Then add one final post at the old location pointing to the new location for the blogs (perhaps even add a link to every old blog post to indicate where the new blog posts are, hopefully there's a footer text of some kind you can use for that)

In fact I was thinking of making a "all blog posts" overview page at the DataFlex.wiki, but then I realized I could do other things with the time spent on that.
So I decided to save myself some time.

But that's what I would do instead of reposting old blogs.