It doesn't include engines or avionics?

Engines are typically bought from the engine manufacturer. The bigger ones cost tens of millions of dollars each.

I was referring to the quoted price and asking whether that price point includes engines and/or avionics.

Given that the airplane manufacturers typically aren't the ones selling the engines (or the required maintenance) the list price is for the airframe itself. I believe Chrichton touches on this in his book, Airframe.