What are these worth?

My father-in-law had a 70(?) New Yorker with the option book thrown at it down to the power vent windows.
He stated that the thing ran great but the gas mileage had gone to hell.
I drove it for a week and beat the snot out of that 440. That was after I replaced the rubber fuel line between the frame and the fuel pump.
I should have bought it when he passed.