Given the fickle economy of Eve Online determining the cost of a ship is no small feat. The price of any given ship is determined by the fluctuating cost of materials, hanger rent, tax, usefulness in battle, and popularity. A ship could be worth billions one month only to drop to millions the next thanks to a patch.
That being said, there are some ships that consistently remain expensive to buy/build. It could be because of how rare they are, the lengths it takes to build them, or the fact that they’re flying bait for zealous Killboard climbers. These costs are estimates based on various sources and do not include any rare or limited edition ships such as the Gold Magnate or Cockroach.