Well, Zeiss name is associated with good quality so I wonder if looking for dirt cheap Zeiss lenses is not a waste of time. Perhaps if you find defective ones and you are handy to restore and CLA them, but that is a different scenario... IMHO cheaper but not dirt cheap would be the M42 Zeiss screwmount lenses that go with the Spotmatics, Prakticas, Fuji screwmount bodies. There are also the Zeiss lenses in the Exakta mount that may be reasonably priced.