World of Warcraft: Trading Card Game recently sold on eBay for $2000. If we'd have known that the Spectral Tiger that WoW Insider gave away last month would sell for $2000, we would have said. "Contest be damned! We're going to Vegas baby!" The reason the card is so special is because it also gives you a rare mount inside of WoW once you input a code.
Another reason the card sold for so much is that the card set it comes form, Fires of Outland, won't even be out until August 22nd. Beyond that, it's still apparently a rare card. As WoW Insider points out, $2000 is 11 years of game time -- and yes, that's the way they think about these things. Of course, like all things WoW, people go nuts and spend all this money and time on something to only have to be made completely uncool and pointless by something else a month later. But, you know, you're still World of Warcraft cool for a whole month.