Selling animals for fighting

Q: For animals used in fighting such as roosters and dogs, their price depends on their fighting ability. If a rooster/dog is an excellent fighter, it would be expensive. So is it halaal to include the price of an animal's fighting ability in the overall price of the animal? Would the amount added to the price based on the fighting ability be halaal?

Making dua to get married to a celebrity

Q: I am a 17 year old high school student, and really embarassed to ask such a question, so I seek Allah's forgiveness.

Since few months I have developed feelings for a celebrity girl who is in my age group. Though the intentions are not ill but I really want to marry her and oftenly ask Allah to make me marry her.

Is this type of dua ok and what should I do about it? Can you please guide me as per Islam.