Some book prices are just INSANE

What is it with Sugar Sugar Rune manga? Volumes 4 and 8 are rip-off priced more often than not, and then those volumes are either Sold Out or some seller lists the Spanish editions. And the one copy of SSR V.8 that I do find for $13, the seller shipped it Media Mail and promptly did not arrive when it should have. I got a refund, the seller apologized for not having a 2nd copy in stock. Well, crap, if you saw the prices, you'd think someone stole my copy and sold it for drug money.

I managed to get SSR books 1 to 5 off eBay from a seller in Alaska of all places and ended up being $6 a book. Vol.6 and 7 aren't so expensive, but V.8?? What did Del Rey do? Print it with gold?

I found another not-as ripoff priced copy of V.8 of Sugar Sugar Rune but still more than reasonable, and this time it better arrive. AND IT BETTER NOT BE IN SPANISH.