Quoted from meSz:3 years ago! SMAUG GOLD was only available to those that pre-ordered before (I believe) end of December 2015. Obviously there were some NIB ones being sold long after as distributors order extras.
FYI - I purchased the second to last Smaug NIB directly from Jersey Jack five months ago (07/27). At that time, Jen said that they still had one more in stock. I believe that these were units that were ordered but never paid for. It was nice because it came with all of the fixes/upgrades already installed.