The other issues that are starting to rise are the mid-nineties premium issues with either insert cards or serial #d cards. That $200K Select Jeter is the biggest one but high end limited edition cards of the era have a loyal following and are getting pricey. I used to pull them regularly from the cheapo bins and junk wax tables at the National but found relatively few available this past year at the show. The unopened has gone up. If there are decent inserts or parallels in the issue, it isn't a $20 box anymore.
On a tangential but somewhat related note, last year I purchased an unopened box of 2013 Panini Golden Age. It was really cheap (I think about $15) and I was hoping for a signed Bad News Bears card. I got one
but I also pulled a redemption card for a signed Stan Lee card. It was long expired but many states make it illegal to terminate redemptions or require valuables to go through the escheat process. I went to the Panini site and plugged in the code and it showed as active. Four months later my card arrived. So those old redemption cards may still be honored.