1969 Barracuda Formula S NOS Tachometer

Capt46 said
But for $150 I'll hang it on my Christmas tree

Opinions only yes! If I had to purchase and was told $500, I would laugh and install an aftermarket unit.

If like me with one of the 272 Auto FB 383/S cars and with N85 option and the original Tach did not work, I would be sweating it!

Fortunately mine did and upgraded it.

You can ask whatever but, I have given my 2 Cents!