Swift, correct me if I am wrong but I strongly believe the GOTY HB Fallout 3 guide was released in limited quantities and again if I am not wrong they limited the print because of the massive amount of pages, it was sold out quickly and so far I can only find this one listed on eBay.
http://www.ebay.ie/itm/Fallout-3-Gam...item3a80727624
Saying this the release of the Skyrim GOTY CE guide has the same potential...
I agree on some of your points but you have to differentiate around the publisher as it dictates the amount that will be printed and even if it is more than the average Game CE it is way more tricky to maintain a book in sealed new condition over the years compared to CE games.