Voyager is 2,000 turns to build and the next ship above that is the Excelsior and it takes 5,000 turns to build. So you can definately get a bigger ship.

Were never meant to be able to buy They are designed to be the police of the universe

Yep, those two ships were shown at the shipyard so people could get an idea how much they cost. Unfortunately the prices we had on them were not even close to real value and some admins bumped the number of turns a player could have so players could buy them.

In the 0.30 code the cost of those ships is ACTUAL cost of the tech levels. And a level 90 ship costs more than any player would ever normally see in the game. More like more than the top 10 players combined would ever see.