I seem to remember that there was an effort to break up sets so we could buy single volumes. There are a number of classics that I would like to buy (well, get for free via FC), but I cannot seem to figure out how to get to the individual volumes. E.g., https://www.logos.com/product/20311/dictionary-of-greek-and-roman-biography-and-mythology
It is likely, though, that I'm not remembering the sales status of sets. Please help me remember. 