Look for these at thrift stores, used book stores, library sales, garage sales, etc. Used books are usually a dollar or two. Of course, the newer the condition, the higher price you will receive. This book is out of print and is highly collectible. Here are a few recent completed listings:
Weight Watchers Slow Good Cookbook New
SLOW GOOD Weight Watcher's Watchers cooker cookbook
If you can find this book, it is a huge money maker! Click here for my free list of thrift store items to sell on eBay.