Buying in bulk is (almost) always cheaper.
Instead of Israel buying 8, Australia buying 12, etc - the price probably is 135 million.
But when you get a co-op together for a 440 aircraft purchase, everything gets cheaper, from the tires to the hydraulic carts.
Yes. At one point the US intended to buy about 32 of our new Zumwalt-class destroyers. They weren’t cheap, but the price was considered somewhat reasonable at the time. Then the quantity started dropping. I think we will now build only 3 Zumwalts. Boy! Those things sure cost an arm and a leg! But they could have been cheaper.