I'm not sure that is a Pam B, is it? I thought it came with the hardback copy of the AE Waite book, though there is always the possibility that the softback book was put together with a Pam B.
I could be wrong but I didn't think the Pam B came with a soft-backed book. When I bought mine it came with a burgundy two part box and a hardback companion book
I saw one sell on ebay a few weeks ago for 250 GBP and it had the original box so I think this one is already overpriced.
According to Holly Volley (http://home.comcast.net/~vilex/SunComparison/OSLine.html), the mistake line on The Sun is missing on the Pam B - similar to the pictures associated with this auction. From that standpoint, the cards themselves look to be a Pam B deck. I haven't researched the book and box enough to address those, however.