I have a copy of this encyclopedic book, and tho it's not for sale, I am curious what it's worth. Any one have any worthwhile estimates? Thanx

A quick search lists several copies for sale. Prices range from $29,00 for a dogeared reading copy to $95.00 for a very nice collectors book with excellent dust jacket.
Good quality reading copies of this book are hard to find. Collectors copies are pretty easy to come by but they are expensive.
It is interesting that often Naramores little Samworth book will bring more money. It is a good book but not close to the Priciples book. The little Sam has been recently reprinted by the NRA's Firearms Classic Library. It is a bargin at $30.00.

There was a recent thread about K-Hornet brass. There are some interesting pictures of pre and post WWII sectioned Hornet brass in the Principles book.