2. Equipment and experience/knowledge of the photographer
3. Time and effort
When I get photos taken, I don't look for the cheapest price. I don't look for awful cliches or desperate attemps at "art." I look at the photographer's work. I want crisp photos that evoke emotion. I want to move people.
I once saw a photographer offering outdoor photos in between 10 AM and 4 PM (the absolute worst time to take photos)
I'm not here to bring other people down, I just felt like I needed to mention that.
Photos are important; while a 30 dollar photoshoot might sound sweet, it has a dang bitter aftertaste.