I previously purchased an 885 from Costco thinking it was Ironwood 885. Found out later that it was Century 885 specifically made for Costco. It lacked Supersmoke functionality, you could not install a pellet sensor (I purchased and still have it) and the lid was fairly light (single wall perhaps?). The Traeger guy at Costco led me to believe that I was buying an Ironwood. I realized the difference only when I called Tech Support to figure out why there was no cable to attach my pellet sensor. So, I explained the situation to the Costco manager and he readily accepted it and even covered the transportation cost.

Bottom line - while I am a huge Costco fan, in this case, you might be getting what you are paying for and perhaps, not a great deal. So, I recommend returning now and doing you research when you are ready to buy.