I have a paperback book  I got from a thrift store with two ISBN's listed. Both of them bring up the hardcover version which has over 50 members wishing. I have looked the entire book over and there are no other numbers. This is the first time I have had this come up. How should I list this?

They most likely re-used the same ISBN.  I think you have to list it manually without the ISBN.  You can post in the Book Bazaar though.  There is a thread for WL books with different ISBN numbers.  Happens quite a bit it seems.

Yes, this book should be posted as a Book Without an ISBN, even though it does have one.  Books posted here need to match the PBS listing for title, author, ISBN and binding type and this one obviously doesn't match the PBS listing.  Publishers do frequently reuse ISBNs for several editions of books, and PBS can only tie one edition to any given ISBN.  The others need to be posted here as Books Without an ISBN.

When creating the new listing you could put the actual ISBN in the listing description, so that it will come up in searches if someone does want this title and has the actual ISBN info as you do.

Thank you for the help... I really appreciate it.  I will list it that way.

Welcome to PBS Carol ! !