What is a 1929 Bambi book by Felix Salten worth?

It depends on the condition of the book, which is purely subjective. If you want to price used books you can go to a variety of websites which will help you arrive at a pretty accurate price. Here is a list: bookfinder.com, addall.com, abebooks.com There are many many more out there. If you go to google.com and input used, vintage or old books you can come up with more. If you have a newer book (like before 1980 or so) you can go to Amazon.com and input the name of the book and get a photo and other informatioin on the book. Rebecca