They really are expensive. Amazon has some of the albums for okay prices.... If you want the photocard to be a surprise. Or want it in the original plastic piece....Some of the eBay prices are ridiculous.
And then you have Yesasia and cdjapan but cdjapan has expensive shipping to the us. And Yesasia is just a little slow to here, they are still a bit expensive, and I have problems connecting any of my cards (prepaid, credit...) to pay on their website.