Just curious:  I'm seeing postings for ARC's being made available in exchange for a credit.  I was under the impression that this was against PBS policy.  Has that changed? 

what are ARC's?

Yes, apparently if they are offered in the book bazaar they can be offered for a credit.  they cannot be posted as regular books, however.

ARCs - and any unpostable book, actually - can be offered in the Book Bazaar for a credit, or as a free-with-order.  As long as the requestor knows up front that the book is not postable (for whatever reason) then it's ok to ask for a credit for it.

Jan, here is a link to my post on the subject. I don't think the policy changed so much as TPTB corrected our assumptions on the matter.

Credits for unpostables

Apparently ARCs and other unpostables may NOT be offered through the main PBS FIFO system, but may be posted on the forum threads free or for one credit.

ARC = Advance Reading Copy, these are printed by the publisher for various reasons.  Some have black and white or other pre-final copy covers and others are almost identical to the finished product, except somewhere on the covers they all say Advanced Reading Copy, and the note Not For Sale.  ARCs can be paperback or hardback.  They are considered proofs and are not necessarily the exact final product.