Decipher is the definition of failure in RPGs, CCGs, etc. There is a reason you got those books for such a good deal. I saw the whole line for sale at Gen Con last year (new) for $6 a book. It's a horrible system and it's also an unsupported system at this point. They stopped producing the line in 2007...
At the time, Decipher's books were selling quite well for pnp RPG books. Problem was that the front office thought it should be selling CCG numbers (much higher) so they forced the game down the same damn bottleneck that killed LUG's effort.