I was just looking at the prices for some other ships and noticed that the Nightingale is extremely overpriced for a simple rank 8 Recon interceptor. Sure it has unique stuff but you still have to work even harder for it too.
Seeing as the Archelon costs 200 ship parts, the Nightingale should cost 250 max. Maybe 225 because of the rank increments. Each “crafable” special ship should be priced in a standardised fashion, such as price=((Rank*25)+25) like the Archelon.