Don't all these 911 cars start appreciating after like 15-20 years?
That seems to be the trend. At least for GT2/3, turbo, and specialty cars. Especially if they are manual transmission cars. The trick is trying to figure out where the bottom of depreciation is and buying them then. Then holding on to them until it is the right time to unload them. Some of the 1978-89 930 Turbos went for BIG money but the market corrected some in the last 2-4 years. But the 930, 964, and 993 Turbos all still bring very strong money. The 996 & 997 manual turbos are bringing good money. But if you want a 911 Turbo and want to go automatic, there are great deals out there. And the auto in them is a great trans. Just not PDK, dual-clutch trans, fast shifting.
And the 996 & 997 GT2 & GT3 cars are bringing even stronger money. Purists think the GT3 & GT3RS is as good as it gets. If you are a track person or live in the mountains then they make a strong case for that. I think the GT3 guys that live in flat lands where every road is straight, like Illinois, and never track the cars are in the wrong car. The Turbo is a better all-around car for daily driving. They just want to say they have the "more desirable" GT car.
I mean Evo did a comparison of the 991 GT3 and 991 Turbo. They ran about identical lap times on the same day on a short track. I think if the Turbo was on the same Cup 2 tires as the GT3, the Turbo would have picked up some time. So those who say the Motorsport bred GT3 is the quickest car around a track isn't always accurate. It's just different ways the car addresses the track.