Keep bomber prices as is. The snac could be double the current price, considering it's damage output. Nova torpedoes could be more expensive as well.
BSes are vulnerable, not so much due to RL analogs (naval history), but in order to balance pvp: one player shouldn't be able to juggernaut his/her way through a fight, just because they're able to trade more.
That said, BS prices should be dropped by a third, considering the vessel's inherent weaknesses. And reverting back to free hardpoints would be spiffy too.