2007 Porsche 911 (997) GT3 RS

The rarest and most extreme 997, the GT3 RS 4.0 squeezed 500hp from its enlarged naturally aspirated engine - the most powerful Mezger-derived unit ever. Limited to 600 units worldwide, it featured the most aggressive aero package, lightest possible specification, and a soundtrack that defines the flat-six era. Now commanding significant premiums, it represents the end of an era for pure naturally aspirated GT cars.

These cars are typically stored and low-mileage which creates its own issues - dried seals, flat-spotted tyres, battery drain. If driven hard, standard GT3 RS issues apply. Values mean most repairs are justified but parts availability can be challenging. Clutch replacement requires engine-out service.

Carbon bucket seats (standard in most markets), Porsche communication system, extended leather trim, any colour other than white, matched luggage set, documented delivery and service history with Porsche.