The Trade edition appears to have a couple of slightly different dust jacket versions. Most dust jackets feature a review blurb by Neil Gaiman above the title. It's not clear how many "plain" dust jackets were actually released, or if this was the pre-publication reviewer's image (approved for book reviews posted online).
These are listing for up to $130 signed.
The eBay listing mentioned above appears to display the cover with the Neil Gaiman blurb on the front. According to the description, however, the first state dust jacket displays a price of £9.99, with a blurb on the back flap by Ramsey Campbell. According to the seller, in the 2d state dust jacket, this was replaced by a blurb from James Rollins and the price was bumped to £12.99.
None of the other listings I've come across mention any of this, so it may very well be a rare jacket. As for whether it warrants the $2,000 price tag -- well, that can only be determined by the beholder. If you think it's worth it, then it's worth it. I will say this though, that particular "signed" copy is actually a bookplate signed by the author and affixed to the title page by the publisher -- there are collectors out there who deem this style of signed copies to be of lesser value than those books that are actually handled and signed by the author. Just something to think about.
The Limited edition has the same basic cover design with embossed elements and a"Limited Signed Edition" statement above the title. This is a slip-cased edition of 1300.
Listings over on
Abe Books range from $100 to $350 (watch the product descriptions to make sure they list the slip-case). These listings don't usually tell you the number out of 1300 -- although the better listings will mention that it is from the limited edition of 1300. Also watch for the "Limited Signed Edition" printed above the title, if there is a seller image.