They aren't worth their plastic. An indication of lack of popularity?

Like several others out there, about a year ago I decided to start collecting the Presidential Dollars in MS65FD for the business strikes and PF69UC for the proof strikes. I like the set on historical grounds and I wanted to get them, and get them in a form were I could look at them without having to worry about anything messing them up. I want these looking nice when my nieces nephews and children grow up and start learning US history right?

Anyway, I've been so focused on other sets recently I haven't gotten any of the 2008 releases and I decided to go on The Bay mostly just to check prices. I won a PF69UC set for just under $36 after shipping, about $9 per coin. Now, I know that it always will be the 70s that get the big bucks, but this seems like an indication to me that people are not exactly "in love" with this set. I don't think this is true of the Statehood quarters, in popularity or price. It's not like one is more numerous than the other.

So what's the problem with this set? Do we really care about cheesy symbolism of our state so much more than our past leaders? Inspite of what's been claimed lately I don't think it's because the coins are more expensive (4x). 1 dollar is not that much every 3 months or a couple of dollars if you're making several sets (they actually come out less often then the statehoods which is another mitigating factor). If you go the collectable route they're actually cheaper. I think this stems from a general American apathy for our own past, a general sentiment of "I don't care about history," or "how does this impact my life?" If true, that's just really sad.