I am going to guess that a buyer’s guide of anything from 1981 is going to be worthless for a modern public library collection. Buyers guides are only good for a few years. Products change, companies that make products change, and of course prices change. This book should have been weeded by 1990. As of this writing, this book was still in circulation. I know it is a reference book, but it is dull and not laid out in an interesting way. It’s dull. You can hear it yawn when you open the book.
This particular edition was also falling apart and should be weeded on condition alone. Buying guides, for any product, often don’t catch our attention. I think buying guides are easily overlooked. Some of these books also get ignored under the “I won’t have any books on cosmetics, if I weed this” mentality. One of the ways around this is going through the collection systematically on a rotation that never ends. Everyone knows to keep an eye on the more obvious areas to weed: medical, legal, computers, etc. Systematically, going deep into a section for a significant amount of time and really looking at a particular subject as a whole can catch items like this book.