Ginetta's G4 was a masterclass in restraint—a Ford-powered roadster that weighed less than most modern hatchbacks and proved you don't need turbochargers or computers to go fast. Built in the '60s when British engineers still believed in subtraction, it's a relic of an era when a car's job was to move, nothing more. Clean examples command serious money now, which tells you everything about where the market's head is.