I have some exercise video-book sets but how do I find out how many credits they're worth before posting them? For example: I have a yoga set that includes a book, a DVD, and a yoga mat all packed in a large box---I'd hate to pay the postage for all  that in exchange for only 1 credit.

Depending on if this is a book w/ a DVD or a DVD with a book would determine if you should post it her or at the DVD site.

Per the Help Center this would be a book with accompanying material. The DVD would qualify as accompanying Media, the mat would not. It would be worth 1 credit, but you couldnt include the mat in a Media Mail package.

I dont think the mat would be required to read the book and watch the DVD, but this is not a Audio Book, so would not qualify for 2 credits.

Allowed:

• Paperback books
• Hardcover books (dust jackets not required)
• Audio books (must be originals, not burned copies)
• Ex-library books
• Books with accompanying media
• Textbooks/Workbooks
• Foreign-language books (if in a language other than English, the language needs to be specified in the book description)
• Playaways (these are considered audiobooks)

Not allowed:

• Anything that is not a book (this includes calendars, coloring books, blank journals)
• Anything that contains advertising
• Advance Reader Copies* (also known as ARC s, Review Copies or Uncorrected Proofs--these are not the final versions of books)
• CD-ROM books/e-books (books that must be read on a computer)
• Burned copies of audio books
• Xerox or otherwise unoriginal copies of books
• Unbound pages
• Music recordings, spoken-word recordings (these can be swapped at SwapaCD)
• leaflets or pamphlets or booklets** without ISBNs (other members complain at spending a credit for these)
• Brochures/Promotional "first chapters" of books - these are not complete books, even if they have an ISBN
• Books that require supplementary non-media materials (non-media materials cannot be sent by MediaMail)
• Pornography (sex manuals and erotica are allowed, hardcore pornography is not allowed)
• Supplementary media alone (without the book they originally accompanied)

All bound books are worth one credit. The accompanying items do not increase its value so you would only get one credit. If the listing of the book says that it comes with the yoga mat, then you would not be able to post it on PBS at all. It would probably be worth more to post it on the DVD site since the SwapaDVD credits have a slightly higher "value" than PBS credits. You'd still only get one credit per DVD disk over there though (the book and mat are not worth credits on any of those sites) and since the mat would disqualify it for Media Mail, postage would be higher.

From the Help Center:

Books with accompanying media Materials: Yes IF the accompanying materials are included

• A book with accompanying audiocassettes (for example) will earn 1 credit.
• A book with accompanying cassettes or CDs is not an "audiobook".  An audiobook is a book read aloud by a narrator.
• If the listing for the book indicates that the book comes with accompanying media materials (CD, VHS, cassette, DVD), all materials must be posted with the book.  If you do not have the accompanying materials, the book cannot be posted alone.
• The accompanying media materials (without the book) also cannot be posted alone.

Books with Accompanying Non-Media Materials: NO

• Non - MEDIA items cannot be sent by Media mail
• Example: a book whose listing says that it requires a decoder for its proper use, or an accompanying deck of cards, or craft materials.  Such a book cannot be posted.
• If the book listing indicates that the book comes with non-Media materials the book should not be posted

Thanks for your help.

I wouldn't bother listing her since you couldn't mail the mat media mail.  If I really wanted to get rid of them I'd list them on ebay.