IMHO, you are probably near a low point in market prices on these cars, but it will take a few years for them to start to turn around. Flash's comments are correct... low mileage will bring better prices as time goes on. I'm a P-car owner for many years, but came around to the water-cooled version just a few years ago. My prior experience shows me that the 20-year mark is pretty close to the low price on market values for P-cars. I looked at 356's in the mid-80's, when people were close to giving them away. Anybody remember the 1976 912? In my mind it was a bastardized 911 with a 4-cylinder and in the 1980's you could get one under $5k, but now it's a hot collector item (why anybody would want an under-powered engine in a 911 is beyond me). I bought early 911's (pre-1974) when they were 20+ years old, and now since they are over 30 years old, they are bringing a very high price, and usually require lots of work.
As they say in the investment industry, 'prior performance is not a reliable indicator of future returns', and with that in mind there are some P-models that have not acquired a following and have not seen an increase in price after the 20-year mark. 924's and 944's come to mind. Hopefully our 968's don't fall into the same category, but there is always the possibility that potential buyers lump them all together.
I think the 20-year mark has a confluence of owner events... original owners probably want to move on; the cars are getting cheap enough that people will acquire the higher mileage vehicles for track and modification; younger buyers will buy them for the P-name without understanding the operating costs; and the deferred maintenance issues just start to pile up to the point where owners realize it can be money pit.
Kim, this won't help you unless you are planning to keep your cars for another 10 years, but just realize that low mileage, well maintained cars will become more rare. For higher mileage cars, drive them and enjoy!
