It is however mentioned in the new edition in Doug Sulipa's market comment where he reckons it is a $500 - $1000 book
Nice catch David!
HAHA...After reading your comment, I went to the guide and looked up Doug Sulipa's article and just to show how obscure this book is, Doug refers to it as "BIFF BAM POPS" rather than POW BIFF POPS. Oh well, it's always easy to get those BATMAN sound effects mixed up!
Thanks for the further info.