All of the Almanacs in the links that you have posted are replicas. The first link you have posted shows the replica that is sold by Markpoon,
who is also a member of the RPF. His ebay username is swindyfan, but he also sells them here in a Classifieds/Project Runs listing. It is the
most accurate replica available anywhere. It has the same inside pages copied from the same source that was used to create the original props.
I identified this book several years ago. RPF member Roland then recreated the page files for Markpoon using a copy of the same book. In my
opinion, the swindyfan/Markpoon replica is as close to a 100% perfect copy of the original as you will ever find.
If you want to get a real one, it will cost at least $5,000 USD which is prohibitively expensive for many collectors. However, in BTTF2, this was
the key, most important prop in the story. Because of this it is a very popular item with those who CAN afford to collect the bigger/more expensive
original items, Therefore it brings a very high price whenever an authentic original prop actually comes up for sale. I don't think you'd ever find a
genuine original Almanac listed for sale anywhere for less than $3,000.
Get a copy of the Markpoon replica. You won't be disappointed. :cool