TheBook.buzz searches many booksellers for rare books, generally defined as signed, limited or special editions. It is updated daily, and keeps tracks of books stock levels and price. To get started, search for a book, perhaps Circe by Madeline Miller (just type Circe into the search box).
You can search for a title, an author or an ISBN. As you type, any matching books will be displayed and you can choose one to see more details, including where it is available, and how much it costs.
We are always adding new booksellers to our lists, and when you get the detail on a book you can see charts showing how the price and stock have changed over time.