> What is especially interesting about this book are the Rarity Scale
> and the Prices.  ... any special significance or value?

It depends on who you ask what kind of answer you'll get.  Some people
like me feel guide books such as the one you are describing are a good
reference for the novice collector to judge the value of a particular
item.  Other people feel they are not worth the paper type are printed
on, at least the value/price guide part of the book.

The argument is only an experienced collector can accurately judge
the value of an item, rather than a one-price-fits-all listing.  The
discrepancy in book-listed values and collector appraisals are mostly
to do with accurately grading the items condition.  More often than not
a layman, sorry, layperson will place his prized family collection
into a higher or the highest condition rating than it is really it.  In
short, they take the highest value listed in the book, and use that as
the value of their music box, regardless of its actual condition.

So if you ask me, I'd say, if you can take a realistic look at the item
you have and not an emotional one, you can get a fair idea of an items
worth buy using the a collector book listing.  I think both sides would
agree the background/general information listed in the book about music
boxes is universally valuable.  I, however, have not seen a copy of this
book myself.

If you were referring to the price value of the book in itself, you'll
have to refer to a book collectors group for that. :)

Michael Grosser