Thats a nice price for the book. I would've thought they were plentiful but it must not be the case.
I pick up Bolland WW's any time I see them in nice shape, which isn't very often anymore. 5-10 years ago you could still scoop them out of 50 cent and dollar bins, but these days not so much.
But of the many I've dug up, this is the one (along with 72) that I almost never find. I don't think WW was exactly a blockbuster title at the time, although that is admittedly just my personal anecdotal remembrance, and definitely not based on any real numbers. The hardcore WW and Bolland people got theirs years ago, and have held onto them. Since then, the run has gained in popularity, and people are picking them up more and more. Same goes for the AH run. See them, buy them. Your going to be finding them less and less.
I'd go so far as to say any Bolland cover is worth picking up - love 'em!