The autograph market is in many ways, reflective of the stock market. When the stock market dips lower, it is the time to purchase stocks. Unfortunately, most of us buy stocks when the market rises and sell when the market drops. This is also true of autographs. That being said, if you can think counter-intuitively, now is a good time to buy autographs. The autograph prices, from many of the autograph auction houses, are quite attractive and clearly more affordable than a few years ago. The prices of average material is down, but good attractive autograph material has maintained it's value. If there are holes in your collection, fill them now.
The trends, as I see them, are as follows for average content material:
Revolutionary War: steady to down
Civil War: down
Hollywood: steady to down
Presidential: steady to down
Americana: steady to down
Sports: steady to down
Space: steady to down
Remember: great content autographs are rare and highly sought after. The prices on great content autograph material is steady and higher.