Antiquarian

At its most simple, an antiquarian book is an old book, but it can also mean so much more.

In modern book collecting, the term ‘antiquarian’ generally defines any physical object that is unique and holds value. That worth may be ascribed to one or more factors, including edition (in many cases, first edition, first printing), quality, binding, provenance (who owned it), or signature. 

https://www.biblio.com/blog/2022/04/what-is-an-antiquarian-book/