Other birds? $5000?
Are you speaking of black market American bald eagles?
Multiple show winning birds from APA or ABA shows could fetch a good price for a chicken but that would not be anywhere near what you are speculating. In reality breeding the near perfection opposites together have a better chance of producing a standard of perfection than mating to a show winner.
A mating trio selected by a master breeder is worth money. He knows his birds, knows the best pairings and hand picks an amazing start into a breed for a person. I could be way off but something like that may go as high as $500 but I sooner believe 200 to 300 dollars is more in the ball park. Then again, anything is worth what a fool is willing to part with.
Foley's Wyandottes are no joke in quality. He's currently selling pairs for $300 including shipping-
http://www.foleyswaterfowl.com/