Inflation's been creeping up for the last few months, which some dealers at the Boston show thought is starting to take a small bite out of the higher end of the market.
But the bigger trend of course is that a few exceptions aside, demand gently declines each year. Most dramatic is looking at the exact same material that sold for less than it did 10, 20, 30 years ago.
Easiest comparisons are with previous Siegel sales. Look at Lot 168, sold in the 2009 Rarities sale (top) and then yesterday (bottom):


And Lot 139, the 1997 sale at top and yesterday at bottom:

