ofrzeta parent
Manuals like AutoCADs have certainly felt valuable https://i.ebayimg.com/images/g/Gm8AAeSwwIZowjzn/s-l1600.jpg It's not even complete, for instance the ADS manual is missing. It's also a bit more expensive with roughly 3700 USD in 1992.
Whoa strong nostalgia hit from that photo. I seem to remember the R13 (the last version I used before shifting into tech) stack of manuals was even bigger.
The Office 4.3 set of manuals were large too, but didn't have the information density the AutoCAD ones did.
Oh yeah, when I said £60, I was thinking of even the cheapest consumer-grade software!