This thread, and many others like it, is a goldmine of handy tips. We have links to providers, solid evidence of migration success and plenty more. However, it's not a great resource at the moment. If anyone has time to collate the tips, links, articles of methods etc into a wiki we (the community of g suites) can help our fellows. A collaborative tips doc will help us all out.

Also the g suite support doc now says a tool will be coming that can migrate purchases to regular G accounts. They've listened (a bit).