To find the value of old books, you can consult with rare book dealers, appraisers, or online resources such as auction websites and rare book marketplaces. Factors that can affect a book's value include its rarity, condition, demand, and any unique features it may have.
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.
You can find the value of old books in a few different places. You can go to a book store.
Most Libraries will have such books
Old books about basic programming can be found in libraries. One will find many good old books for programming in libraries of colleges or universities.
Old chicago
how much for 100yr old ART BOOKS WITH INK DRAWING
The three books in the old testament of historical value are the book of Esther, Ezra and Book of Songs.
Some books
It depends on the particular book you have and their conditions, try searching for their titles on Abe.com or Alibris.com to find out if they have any value.
Most old Encyclopedia sets have little value, because the content is out of date. But you could try a used books dealer.
You can reach out to a comic book appraiser, a local comic book store, or use online platforms like eBay or CGC for an estimated value of your old comic books.
Find a dealer.
Old gun magazines, the library, the internet, old books.
To find the age and value of an old tapestry, consult an appraiser. An antique collectible may also be able to help you find this information.