Well look at it this way, if you were to compare a modern day jetfighter cost of (I'm guestimating) $50,000,000 american dollars to a Modern day destroyer which is probrably upwards of a few *hundred* million dollars (If not a billion) it makes sense that the price differences would be about the same when it comes to purchasing fighters and cap ships in the game. Unfortunately vanilla FL doesn't leave us with a guide for pricing because it didn't include cap ships in the first place.