Moreover, one might want to consider the worth of an atmospheric plane, with hours of flighttime, as compared to a craft that one can live in.
Or play the SP again, and look at how much bigger than trent (a pretty big man) a bloody starflea is. The ships are more than weapons, they're homes. They can support a pilot or a pair of pilots indefinately, and traverse the depths of space. Name a military boat that a nation sells, will you? Because your grounds of comparison is broken. Spaceship