Around about 1972 a BAC 1-11 was $2,200,000.
My father, as Flight Shed Senior Inspector, was handing over a new 500srs. to Philippine Airlines one Sunday and was given the cheque for the payment as nobody from the Commercial dept. was working at the weekend. He brought it home and showed it to me.
Just thinking though, there may have been a deposit paid earlier so the total price may be higher.