FWIW I bought a brand new Colnago (2017 model in 2018) with full, then current 105 for $1200 from an authorized dealer, and it wasn't a demo, and I didn't settle as it's the exact model/size/color I wanted and had no cosmetic or mechanical issues of any kind. Wasn't even on the floor for people to fool with, it was built up in back. It was also full 105 down to the chain and cassette, with the only exception being the brake calipers, which I upgraded to 105 at purchase. MSRP was $2500. Perhaps I got an insane, abnormal deal of the year (purchased mid June, so pretty much a month after season really gets going here but not January or something), but it just goes to show you shouldn't be paying anywhere remotely close to $3k for a 105 bike, or even Ultegra if you shop around. Not to mention, a lot of bikes out there don't use a full groupset, so many of them mix and match brands/components.