When I did a tour of the Boeing factory about 4/5 years ago, the price they quoted was about 220 for the 777 and 200 for the 747 then. I doubt whether Airbus will admit what breakeven is for the 380. However the majors have not even started ordering yet. Good routes? Europe -Australia and Europe South Africa where one end is in summer and the other winter- so low seasons are short. Add on Europe-Far East, and you have a large market already. When they start appearing on LAX/SFO- Far East, people are not going to want to travel on an old fashioned 747! They'll sell, big time.