I’ve just started this course:
It’s about $100 (+VAT here) however Connor (Roam author) has said that when they charge for Roam they will comp you the cost of the course if you prove that you’ve taken it (screenshot).
So, if you’re considering Roam as a long-term investment this can pay off well.
The guy seems to have delved into Roam and thought a good amount about it. Probably worth it even without the rebate (I had thought about it, but I was more on the fence about Roam anyway then).