When I do a search on Posted books, I can't see where it shows the number of books available. Clearly, if I searched "Posted" books there is at least one copy available. When I search Wishlisted books it shows how many people have the book on their wishlist. So, could PBS put the number of books available on every search type result for each book? It would be handy to know, if there is only 1 book avail, I should request it ASAP.

If you add the book to your reminder list, you can see the number of copies listed from there. This is what I do and when I notice a book has only one or two copies left, I will order it.

I think they are working on a way to do that as part of the new WL.  That's what I read her way back.  I think on SWAPADVD that it shows how many are posted when you pull up a listing.