Nope, only one edition ever sold.
IIRC the iLife 05 package came with a CD as well as a DVD. The CD version only had the iMovie, iPhoto and iTunes packages on it (Garageband and iDVD were only available on the DVD), the reasoning being that people without DVD drives would be able to install the 3 core applications. The DVD had all the software installers on it. Is it possible that the same thing happened with iLife 06 and what you are seeing being sold is the "spare" CD that came in the box which is sans GB or iWeb? Or maybe there were just two DVDs in the box and people are selling the one they don't want?