In September 2008, EA released a "Ultra Limited Edition" version of Dead Space. They only made 1,000 of these and quickly sold them out at $149 each.
One of these is now up for auction on ebay and is already selling for almost $200. I haven't seen one of these for sale in a long time so it will be interesting to see how high it goes. It is already the most expensive Xbox 360 game at it's current price.
The "Ultra" in the title confuses me a bit. EA didn't make a regular limited edition for Dead Space. Wouldn't this game just be "Limited Edition" instead of "Ultra Limited Edition"? It sounds like an amp that goes to 11 instead of 10.
Either way, next time EA releases a "Super Duper Limited Edition" version of a game I will be sure to buy it.
UPDATE: On February 16th someone listed a sealed Dead Space Ultra Limited Edition for auction and it was purchased within about three hours with the Buy It Now price of $458. The sealed version of this game would definitely sell for more than $450 in an auction.