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.
The reason why devices go up if they have the original flappy bird is that people can take the game, copy the data and make a replica game of it. That's why there are so many copies of the original flappy bird.