I find it funny how people are making the prices of their electronics go up, merely because they have flappy bird on it.. LOL. Just think of a price and sell it. I personally don't think it should be more because of a game.. But do what you wish. Just don't put the price too high.
Nothing. I don't see why people think that flappy bird is worth so much money. I saw someone have an iPhone 3 on the intranets asking for 2000$, but I don't think anybody will buy it. I doubt someone will.
People will buy almost anything. My friend wants to sell his iPhone with flappy bird for $90,000. People are going crazy over it so I say just go ahead and try to make some money. My high score is 81, btw.
The same amount as it is just for the phone. Having a certain app that isn't available on the app store anymore doesn't increase the value, but thinking that it does just increases the world's stupidity.