looking into a 456 owners and ex owners please help

This has been discussed regularly on this forum. In my view, there are likely good cars in the 60-80 range. At 60, I'd expect an early car (here in the US that's 95-97) and maybe with higher mileage (north of 30k) and/or no records and/or missing tools or books and/or with the major service not recently done--i.e., last three to five years. That doesn't mean they're bad, just that you should accept a higher likelihood of surprise and should be extra diligent in your pre-purchase inspection. Still, even a good ppi will miss abuse that won't be apparent. Cars with no records, cheap tires, and missing tools and the like tend not to have been owned by fastidious people who lavish care and attention on their vehicle. I'd look for a car that's had the window service done (by now that's likely about all of them), that has its ancillaries and records, and a recent (expensive) service done by a guy who's owned it for at least a few years. I think that car can be found in the mid to high seventies. Some will speculate about where the prices go (downward or steady at this point), but given the relative numbers produced and the unwillingness of some people to maintain them, the breed will start to separate itself.