There is a book about everything so I am sure you can find books on these topics online (used) or at your local library.
Some suggestions for books about vintage quilts include:
"Vintage Quilts; Identifying, Collecting, Dating, Preserving, and Valuing" by Bobby Aug
"Miller's American Quilts: How to Compare and Value" by Stella Rubin
"Clues in the Calico: A Guide to Identifying and Dating Antique Quilts" by Barbara Brackman.
Remember that suggested values may not reflect modern prices. Also, if your quilts feature older textiles, some quilters use vintage textiles in making newer quilts. You need to learn how to identify patterns, textiles, etc. A book will also help you learn how to clean, store, and take care of your old quilts.
There is a Facebook group for antique quilts. You can also check out the International Quilt Museum site as well as the National Quilt Collection at the Museum of American History online.
For information on stamps find the American Philatelic Society or the Smithsonian National Postal Museum. Both sites offer lots of information and links to helps you learn about stamps.
You can learn more about Ball jars online. There are many sites that will help you learn how to date a Ball jar. Collectors clubs can be a font of information. Look for vintage or antique bottle clubs, many of which include old fruit canning jars. You can also check out some books on the topic including:
"The Collector's Guide to Ball Jars" by William F. Brantley
"Fruit Jars: A Collector's Manual" by Julian Harrison