Mandrake wrote:8 Volumes in printed format must have been very expensive compared to the CD version.
I have just purchased a set from the US and they were under £100 (including the postage) so pound for pound the set is (in my humble view) extremely cost effective. I have noticed that there is one person who regularly offers the set (all eight volumes) for somewhere around £120 on ebay, which all things being equal is still a bargain considering the material you get.
True, some of it is dated but the thinking on angles, considerations of history and parallel thoughts make it a must have if you're the sort who will persevere.  You can use it as something you dip into now and again, but the value is using it in a structured manner (as if you were getting the originals through the post and working through each one like the part-work it was intended to be).
HTH.
Vic