Automate from subscribers list to sales list after a purchase

We have numerous subscriber lists for downloadable sports nutrition guides and from those subscribers can purchase a product. How do we automate the process once they’ve made a purchase they move from a nutrition guide list to our main sales list and then be removed from the ‘guide’ subscriber list?

And to add a level of complexity can they be tagged to come from a specific guide. For example we have guides for road marathons, ultra marathons etc and it would still be useful to target them for their specific race preferences.

Thank you in advance.

Rupert