I think subscribing to that was one of the best things my parents ever did for my education. Over the course of my youth I devoured it several times and credit it to my earliest exposure to countless subjects that they'd never touch at school.
One of the most notable things about The Joy of Knowledge was the extraordinary explanatory art. One day I will have to find my books and make some scans.
And, yes, I seem to recall the price was something in the $500-$1000 ballpark. Which was definitely a lot of money in the early 70s(?) when I got it--and, yes, the salesman came to the house.
Same here! The knowledge was obsolete but the memories of my childhood were a part of it. I eventually recycled most of them after I last moved but there are a few books I still have somewhere.
A few years ago, during a move,I finally parted with the set my parents had gotten in the late 60s or early 70s. It was painful, but I had to really downsize at the time.
I still have my 1911 edition, which I can't get rid of, even if I haven't cracked a volume in a couple of years.
One word for Encarta and the like: Edutainment.
Looking up things in the card catalog, and on microfiche at my local library, was as much fun as locating the book itself. Sometimes, in the course of searching the catalog, I'd come across other books that sounded interesting, so I would write down those call numbers, too.
Or browsing microfiche roll magazines and newspapers - high speed fast forward and reverse, then for 10 cents a page (!) pop off a copy to take home.
That is one part I don't miss - having to pay for photocopies...