Find out in the front HOW old it is and then try and workout how much you would pay for it? Maybe ask a libarian. He/she would most-likely know. If not then have a wild guess.
Find a dealer.
Google, or a book made especially about old coins.
Bookfinder.com is a good place to view what other people are asking for similar books. This is not the same as knowing what similar books have sold for, but it puts you in the range of value --unless your book is so rare that nothing like it can be found for sale.
Blue Book of Gun Values
Abebooks.com is a good place to start.
The best place to find the value of your old car is to get the Kelley Blue Book value. You will find this at www.kbb.com, and enter the car's information on the website in order to determine the car's value.
Look up "Blue book of airguns 8 edition."
Book value of company is the book value of equity of company which can be found from balance sheet of business or book value of business is the book value of assets of business.
A car book value is the value of you automobile. Kelly blue book is a free site where you can find the value of your car based on the condition of it.
You can find the book value of a used car by going to kbb.com. Kelley Blue book is the official book that people nationwide will use to value a used car.
One can find the listed value of your car in the Blue Book by purchasing a blue book. One can also find this information from using Blue Book resources online.
Go to a book store or Library and find a book called "Blue Book of Airguns 10 edition." In there you will find on page 634 the set values for the webley Junior.