I bought a new copy of this when I was still at school (needed to specially order it from the local bookseller) using pocket money. It has the silver cover in paperback and cost the best part of £5 when it came out - a small fortune at the time ! Back then it was an invaluable and unique resource and could be frustrating e.g. when referencing rare Blue Note LPs in the US version, long since deleted and seldom seen on our shores by mere mortals.
Still have it. Also have the 2 volumes of the updated edition (red and green covers) from much later. I quite like Stuart Nicholson's reviews in the Vol 2.
Update - sorry to repeat myself from earlier posts (forgot about them) but I like the book !
It kept its value I guess !