Is the Porsche 911 GT3 a good investment?

The thesis

The 997.2 GT3 with its 3.8L Mezger flat-six and 6-speed manual represents the last naturally aspirated, manually shifted GT3 before PDK became standard on the 991.1. UK market prices sit firmly in the £120-165k range for good examples, having appreciated steadily from sub-£100k five years ago. The manual GT3 thesis is well established but not yet peaked—997.1 RS and GT2 RS prices suggest room to run. Strong demand for analogue Porsches supports continued value retention.