You have a nice selection of precancels (with a few box cancels mixed in). However, as far as I can see, nothing would be considered especially scarce or rare. In other words, they are all relatively common and probably worth $0.50 or less. The one that I especially like (although I don't believe it has any significant value) is the Centralia, Illinois precancel with no bars (last stamp in your first scan). I expect that would look very nice on an album page.
By the way, if you're interested in precancel information--and even free album pages to download--this link will take you to a site that has a great deal of information (Precancel Stamp Society):
http://www.precancels.com/