"They're going for stupid money on eBay..."
That's a understatement! Wow!
Not to my taste, but I've never heard of Marc Jacobs either. Not much makes it back into the depths of my cave! :-)
Marc Jacobs is a high end fashion designer. If you check other sections on the site, it shows that his bags and other items sell for hundreds, mostly thousands of dollars. He also has "Marc by Marc Jacobs" which is cheaper, but still expensive. The bag I wanted cost $500 and the laptop bag I was eyeing was $120. Frankly, I'm surprised the cards are being sold for that cheap on his website. But then again, he's a big name only in the fashion world, not so much in cards, so I guess he has not much of a leverage there.
$30 seems too much to pay for this deck now that we know it's available for $8 on the website, but I've paid much higher than $30 for some decks before and would have probably got suckered into paying that much for this deck if I didn't see this thread beforehand or thought to check his main website.