This idea that we got 'mugged' is ridiculous.
I gladly payed $85 to import a 64g card. I wasn't 'mugged'. I wasn't stupid, ignorant, or anything else. Is a standard SD card cheaper? Sure, but I don't need one of those.
Looking on Amazon, it looks like a 64g SD card runs from around $25 to $40, give or take. So let's call it the low end, $25. That means I would have paid that anyway, so I essentially paid $60 'extra' for my 64g card.
That $60 doesn't bother me. I know some of it subsidized the price of my vita, so it was just moving dollars around. I know some of it [likely a lot of it] is because they're far more expensive to produce so there's zero economies of scale. Just like anything else, I'm paying more because it's more expensive to make.
And I'm not upset at Sony for going proprietary. If anything, I'd aim that ire at the people pirating on PSP that led to this decision in the first place. It sucks for everyone, no doubt. But I don't blame Sony for locking the thing down.
Ultimately, it's just $60 to make my favorite device a whole lot better. People think nothing of buying expensive 'elite' controllers, or other expensive 'luxury' adds for their PCs and consoles. And that's what a 64g card is... nobody 'needs' one. They're just nice to have. The vast majority of people would get by just fine with a 16g card or so. Acting like a [effectively] $60, unnecessary, luxury purchase is why people aren't buying the vita makes little sense to me.