Just make a few trade runs. If you check your cargo hold, you will notice it's a little bigger than it used to be.

You don't understand, I loaded up an old game where I own the Eagle but am at Planet Manhattan and I want to buy the Whitestar in order to test flight it and make sure my FLMM stuff is 5x5. However, to purchase the Whitestar, I need money and I'm not really interested in playing this game (I beat it when it came out and its been gathering dust ever since). But I am a huge B5 fan and I just want to at least what these new ship models look like in flight. Isn't there a fast way to cash? I'd hate to just give up on this after 30 minutes of work on it.

if you have the complete pack there is
go to newark station and buy boron there then fly to the babylon 5 system to the planet there and sell the boron there should be very expensive so around 12000$ there, if i remember correctly. otherwise try smuggling cardamine from planet malta to planet manhattan, especially with a huge cargo hold its a good route

Go to the B5 planet, buy the Titan, go to Pitts, buy as much Boron (the Titan has a modded hold) as you can, go back to B5 planet and sell. That should get you enough money. =D