I've been fairly appalled at the expense of Road Scholar's online offerings. Since they started these after the pandemic started most have been in the $400-$500 range. That is ridiculous. Plus the reviews I've seen on them have included complaints that 1.5 hours of "lecture" time included a 15 minute "break" and 15 minutes of discussion with other Road Scholars. Uh, no.
There was one on Alsace that looked interesting and I'd actually had the lecturer for a local guide on a Provence tour but no, not going to pay $500 for online lectures.
They do have some in the $25 category for a one-hour lecture but I've not done any of them yet.