http://www.ebay.com/itm/Pokemon-Dark-Dragonite-1st-Edition-Error-Card-5-82-Near-Mint-Mint-Condition-/281034136181?nma=true&si=wkpbTtEj%252BeVTnkMs6W28J98uh0k%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557
The error is that the card is numbered 5/82, so it should be the holographic version, but it's non-holographic. It sold for higher than normal for this error because it was also 1st edition. I've heard estimates that around 5000 of the unlimited version were made. I don't know how many 1st edition ones exist, but apparently very few. This list says it's the 3rd rarest error card ever produced. A pre-release Raichu, the rarest error card, sold for $10,000 a few years ago.
The error is that the card is numbered 5/82, so it should be the holographic version, but it's non-holographic. It sold for higher than normal for this error because it was also 1st edition. I've heard estimates that around 5000 of the unlimited version were made. I don't know how many 1st edition ones exist, but apparently very few. This list says it's the 3rd rarest error card ever produced. A pre-release Raichu, the rarest error card, sold for $10,000 a few years ago.