Interesting. Another thing is, how do you determine market price for the project? I mean, your prospective clients might also ask quotes to competing agencies. So how do you know your price is competitive enough?
We also had cases where potential clients decided to go with a cheaper option and then came back to us to "rescue" the project.
In the end the price itself doesn't say too much. More important is the value you get for that price and that is different for every agency. There are things like quality, being pro-activity and recommending the right things to do (not those that make the agency the most money), experience beyond pure design & development (e.g. marketing apps, getting featured, high App Store ratings and reviews, etc.)