As someone who used to be an avid card collector I can tell you that PSA, and their set registries have a lot to do with what card collectors will pay. If one millionaire has a GPA of 9.2 in the registry, then the next millionaire will spend big bucks to move ahead of him with a GPA of 9.4. While I still have some cards, I moved on, and just started collecting things that interest me. I have a great ticket collection, and I am currently trying to build a nice comic collection. If CGC ever started a registry similar to PSA's (I assume they haven't yet), then you could expect to see comic prices increase even further.