Merchandise Group
Merchandise Group is a classification developed for CollectorsBookMarket to help buyers find merchandise with or without specific characteristics.  When sellers assign the appropriate Merchandise Group value to each of their items, the system can quickly and accurately return records from only the Merchandise Group or Groups the buyer wants to include in their Search or Browse results.  

An Original/Trade Edition is a standard book in it's original binding, published to be distributed by the publisher and sold through normal book trade channels (this includes reinforced binding books designed for libraries, but not if they have actual library markings, see Ex-library below).  The vast majority of books available today are Original/Trade Editions.  These can be hardbacks, trade paperbacks, mass market paperbacks, staple bound magazines, or any other binding, however, any book that has any type of Library or Remainder mark (see below) must be classified as an Ex-library or Remainder.
Limited Edition should be used for any limited print run or individually bound book.  Numbered Limited Editions, Private Presses, Custom Rebound books, Contemporary Rebound Books, or any other special edition.
Ex-Library is used for any book that was formerly the property of a library or other lending institution.  Any book retired from any kind of library or that has any library markings, stickers, or attachments MUST be categorized as Ex-Library, regardless if it is a hardback, paperback, periodical, or other publication.  Buckram or other library rebound books should be classified as ex-library, even if they are free of other library markings.
A Book Club Edition or BCE is a book issued by a book club such as the Book Of The Month Club (BOMC) or the Literary Guild, and not distributed by the trade publisher. Usually, but not always, separately printed, often on less expensive paper and with a lighter binding. 
Note: For more information on identifying Book Club editions, How to Identify Book Club Editions by Craig Stark at Bookthink is good place to start.
A Remainder is a book that contains a mark of some sort that designates it as "not returnable" to the publisher. Remaindered books are usually marked on the bottom (or other) book edge with a stamp, a marker dot or slash, or spray paint. Use this value for any book with one of these or any similar mark whether you know if it was an actual Remainder or not.

use also for:
Galleys
Proofs
Review Copies
Salesman's Dummies

Use this value for ARCs (Advance Reading Copy) and other pre-publication items- An ARC is a copy of a book distributed to reviewers and prospective booksellers prior to publication. An ARC may have a different binding or cover than the actual Trade Edition. Other pre-pub copies are: Galley/Proof- Bound or unbound uncorrected or hand corrected pre-publication copies, Review Copy- A copy sent to reviewers or prospective booksellers, designated by stamping, printing or laid in material, and Salesman’s Dummy- A mock-up of a book used by salesmen in the late 19th and early 20th century to show prospective buyers what the book would look like. It usually had a title page, 10 or 20 pages of text, and then blank pages to fill out the rest of the binding.
Use Audio Book for any recorded book on cassette, CD, or other medium.
Periodicals include any item published at regularly scheduled intervals: Magazines, newspapers, journals, catalogs, etc.
Use the Non-book/Other value for any non-text or non-book items such as Accessories,  Ephemera, Posters, Prints, Videos, etc.
Undeclared is the default value for this field. Items with this value generally indicate a book that was bulk uploaded, but the seller didn't want to take the time to edit their records to take advantage of our identifier fields which aid buyers who are browsing or searching for particular kinds of items.  Buyers have the option to include or exclude the Undeclared value from their search or browse results.

Note: For more information on the standard terms used in the book industry, we recommend the comprehensive  IOBA (Independent Online Booksellers Association ) Book Terminology Glossary.

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