I don't know why it would be so highly priced for you, because on the UK Amazon, there is this one: https://www.amazon.co.uk/Devil-You-Know-Heaven-Hell/dp/B0021TVYV2/ref=sr_1_1?ie=UTF8&qid=1520722839&sr=8-1&keywords=the+devil+you+know+heaven+and+hell
Do you really need the vinyls? Amazon will sell you the complete Ozzy era on MP3 for $56, that's the best deal you'll find.
there is a great book called 'Rat Salad' by Paul Wilkinson which goes in depth of the writing of the songs.. sure it's not a member of the band but it is very interesting look at the actual music theory of the tracks
https://www.amazon.co.uk/Rat-Salad-Sabbath-Classic-1969-1975/dp/0312367236
Here's a couple options on Amazon, all well under $160
https://www.amazon.com/SEVENTH-STAR-SABBATH-Black-Sabbath/dp/B004222UCS
I did find a torrent of it on a pirate ship, but there's no seeders, so no luck there. Didn't do a whole lot of digging after that, though.