Could be TZD were the only ones shrinkwrapping their Duo systems, then again, shrinkwrap could be damaged in a store and then removed.
Interesting to hear some Duos were purchased shrinkwrapped, and some were purchased without.
Anyone actually buy a "Core" Duo, other than from TZD when they were clearing them out in 2001? I don't recall them being offered in stores, then again I can't rememeber seeing many Duo systems in stores.