Originally Posted by
Bojay1997
Printing errors are very common in guides and other bound materials. In fact, I believe the error rate on books and magazines is still something like 1-2%. Usually, the publisher receives an extra 2% overrun from the printer because they know a percentage will be damaged, misassembled or otherwise imperfect. I think the value of what you have is actually far less than the same guide in regular condition. It's not a collectible rarity, it's a defective product and pretty useless.
It's fascinating to me that people always assume that if something has an error that it is worth more. The only reason those upside down stamps were so valuable is that at the time, the post office ran the stamp printing operation with the same care as the US Mint printed money. As such, the chances of a defective stamp coming out, much less getting into the hands of collectors was next to none. Spend some time at your local Borders or Barnes and Noble and you will be able to see literally dozens of books and magazines a week that they return to the publisher due to defects. Nobody collects them because they are worthless.