I'm curious as to how a second-hand private yacht ($1,200 mil) can be worth more than the build cost of the largest cruise ship in the world ($700 mil). Don't

I'm curious as to how a second-hand private yacht ($1,200 mil) can be worth more than the build cost of the largest cruise ship in the world ($700 mil). Don't watercrafts depreciate like crazy? http://en.wikipedia.org/wiki/RMS_Queen_Mary_2 http://en.wikipedia.org/wiki/RMS_Queen_Mary_2