I was just looking at an email from Amos Advantage offering "pre-orders" on the 2016 Scott Catalog (Vol. 1) at a retail price of $124.99 or AA price of $94.99 ... a $5 increase from the 2015 edition.
Curiously, the pre-order announcement contains some conflicting information. The e-mail suggests that there are
nearly 1000 value changes in the US Section, whereas the individual listing suggests that there are
more than 1000 value changes in the US Section, adding that a large number of value changes are for recent nondenominated forever stamps which have been adjusted upward in mint, never-hinged condition.
http://www.amosadvantage.com/scotto...tegory=CLG16It sounds like most of the value changes involve modern issues with minimal value changes in stamps from the classic era.