Think about what you were doing when you were in your early 30s. Driving a car like this 1969 McLaren M6 GT (the ad says 1964, but that appears to be incorrect) on the streets as a daily driver? Only if you were Bruce McLaren. From the seller’s description:
Prototype s/n BMR M6GT-1 Red with Black Interior The McLaren M6B GT is among the rarest and most desirable McLaren’s built. Based on the successful M6A that dominated the 1967 Can Am season, the M6B GT was borne out of Bruce McLaren’s desire to build a version of the car with a coupe body suitable for endurance racing. When an FIA rule change required the construction of 50 cars for homologation, the scope of the project became too large, and the plans for using the car as an endurance racer were abandoned. The prototype was completed for Bruce McLaren’s personal use as a street car, and he used it to evaluate the possibility of building and selling McLaren street cars. As a street car, the car was never terribly convincing, but it was an absolutely ludicrous high performance street-legal car whose 1600 pound curb weight (about that of a Mini) and racing derived Chevrolet engine made for an unforgettable experience. A December 1974 road test by Road & Track confirmed the lunacy and performance of the car. It was, in essence, a street-legal Can Am car, one which Bruce McLaren used for daily transport for more than six months until his untimely death in June of 1970.
To clarify the “prototype” status of the car, the McLaren Trust has a brief entry on the M6 GT that notes this car was actually the prototype of a series of road cars that McLaren envisioned.