A Rogue Trader Dynasty, fresh from adventures in the Expanse, wants to buy a ship. Arriving at a suitable location they seek out a Vagabond-class Merchant Trader, and find one available for sale.
From the rulebook, p271 on Acquiring a Starship:
"A ship’s Hull Modifier is equal to the hull’s worth in Ship Points (see Chapter VIII: Startships for
details on hulls and their Ship Point value). Because starships are extremely rare and powerful, only one warp-capable vessel may be acquired at a time. In addition, no additional modifiers aside from those gained by a successful Commerce Test may assist with Acquisition Tests to acquire a starship—the fact that a Rogue Trader “is only buying one!” does not make things any easier."
Does this mean that buying a starship hull, for a vessel costing 20 SP, is only a -20 on the profit factor roll? On par with a Best craftsmanship heavy bolter? Somehow this seems wrong, but I'm not sure where else I should be looking.