Let's see - I spent about $600 to build up my new mixte about 6 lbs lighter than my last mixte build.
Lighter frame: $175
Lighter saddle: $140
Lighter seatpost: $122
Lighter crank $165
At about 3 lbs difference, that's about $.44 per gram.
No rack, bag, or kickstand - free
It's perhaps another 3 lbs lighter without the stuff inside the bag - a lock, tools, and spares, but less flexible and capable. The 9 pound difference is keenly felt when lifting the bike, but is much less noticeable riding, at least on the flats. But it is still noticeable.
So, more of a weight-beef frank, I think.