Ship stats:
Start at &9720
6 7-word blocks:
offset 0: 120, 130, 142, 150, 170, 200
       4: 5,   6,   7,   8,   10,  12
       8: 4,   4,   5,   6,   6,   6
      12: 0
      16: 0
      20: +&9720=address of shop desc.
      24: Cost - Shuttle=4,000, sirius=8,000, wing=16,000 nova=50,000 kosmos=500,000 magnx=500,000