This isn't just any Yu-Gi-Oh card. It is apparently a one of a kind Yu-Gi-Oh card. And it's one that has an astronomical price tag: a cool 10 million bucks!
Printed on stainless steel, this unique Black Luster Soldier card was given to the winner of the first nationwide Yu-Gi-Oh tournament in Japan in 1999. On CardCollectors.jp, the seller states that this one-of-a-kind card cannot be used in tournament play.
Above, you can see the card. There's a tag on it that reads "genuine article" (honmono or 本物) in Japanese.
When asked why the card is so expensive, the seller pointed out that this is a one-of-a-kind item, and it's not for sale anywhere else. Well, yeah...
It's priced at ¥998 million ($10 million) and comes with a letter of authenticity as well as a handful of other apparently rare cards as freebies. But if you cough up the cash, you might want to have an armed guard pick up your purchase.