I go to enough conventions to know that, although it sounds insane, $200 is a pretty decent price for two people who still work and played iconic characters. I'm not a photo guy but I'd pay that money to get their autographs.
With Millennials, it's all about the selfies. They could care less about autographs. Here I AM with the celebrity.
Meanwhile, I treasure my Ray Bradbury, Robert Bloch, Fredric Brown, etc. autographs.
And I actually went to a concert the other day where iPhone photos or videos were not allowed. You actually had to just listen and watch. Imagine that.