It's rumored that Klein would deliver custom painted bikes for an order of 10 or more. The Gossamer paint scheme along with a couple others (Graffiti, Storck, Pearl Black and Cosmos *I think*) were some other examples. So, logically this bike may be one of the 10 bikes like it in the world. Coincidentally I used to own a brand new XS version of this same bike back in 1999/2000. So, arguably I've owned 2 of the 10 Gossamers in world, not bad.
Needless to say this is a very special bike, especially considering it is a complete fuselage and in a very desirable Medium size (many of the accounted for Gossamers were XS or XL). The build is not very exciting but that can be easily remedied. I plan on building it up with M900 unless some other interesting options come up.