Book value?

Just a short question: I've noticed that the book style reissues of TFs don't seem to be selling for very much. Is there any special reason why they're still easy to get and not too expensive?
SEIBERTRON - Your Planet For Everything Transformers
https://www.seibertron.com/energonpub/
https://www.seibertron.com/energonpub/viewtopic.php?f=4&t=25179
Bonecrusher27 wrote:Just a short question: I've noticed that the book style reissues of TFs don't seem to be selling for very much. Is there any special reason why they're still easy to get and not too expensive?