Some of these guys have been playing the game and sharing information for 15-18 seasons now. They've come to concrete solutions about the ideal prices and the ideal arena size because they've already tried all the combinations, studied the other top teams and figured out what the prices the game engine rewards best.
hy i tried my prices too, and said why i choosed so and they are still reasonable for me ... And at least good enough to get a own thread, complaining about my income^^