Quite properly... not in the public domain. Buyers do not wish to know that the price they are about to pay...causes a loss, thus imperilling long-term ownership/future asset value, or is nicely profitable, thus overpriced.
Is it sufficient to know that UK Aerospace industry is more profitable today, making bits and bobs, than ever when delivering complete aircraft? We, UK taxpayers, funded most Aero products, in part or in full, until very recently. Visibly, on Project Accounts, only Viscount yielded a profit to Treasury (£1.5Mn. Launch Aid, £3Mn. Levy yield). Corelli Barnett,Verdict of Peace,P609: “more profitable (if the taxpayer had invested in) plastic garden gnomes.”
So why, I hear you say, do Nations spend taxpayers' money on loss-making durables? Prestige, independence, commercial spin-off from high value-added technology...
This affliction is neither UK-centric, nor airliner-centric. Many/most manufacturers of complete aircraft have suffered financial pain.