They typically are pretty easy to predit the sale prices. 36 lecture courses are often discounted to $99, rarely below $70. The 24 lecture ones are often discounted to $69. Only on rare special occasions can you get them for less than that. You might check quickly on Ebay, although many of these hold their value well.
We do like this one very much. Instead of a strict “chronological” style presentation, she overviews the era and then focuses on various aspects of life, like religion, castles, cathedrals, family, clothing, food, etc. She is an interesting lecturer–she is actually an expert on medieval British literature, especially Arthur sagas. My ds looked up some of her work after watching these. It filled a good spot for us–that son, when doing Middle Ages, had already read the Guerber book, and most of the other texts I found were either LESS info, or ginormous (like 800 pages!) and he didn’t want that. So we did some literature and this course and it worked well for us. I may very well use it again with ds #3. We just watched one a week and it worked out great.