It's not easy to pin down the most memorable Porsche 911 ever made. There have been some truly great iterations of the iconic sports car through the years. Some examples that spring to mind include the 930 Turbo, the first production turbocharged 911. The 993's perfect proportions and its standing as the last of the air-cooled models make it a classic, and pretty much every GT3 has been close to perfect. Of course, no list of the best 911s is complete without mentioning the 1973 911 Carrera RS 2.7, a car that partially inspired the all-new 911 Sport Classic. Now, a particularly special version of the RS 2.7 is going up for auction.

Listed by RM Sotheby's, this 1973 911 Carrera RS 2.7 is a rare Lightweight edition. It is believed to be one of just 200 examples like it that were made in this specification. With a single owner since new and factory-correct Light Yellow paint over a black interior, it's an absolute beauty. The Lightweight specification used thinner steel for the body panels, thinner window glass, fiberglass bumpers, and racing seats. Porsche went as far as to ditch the rear seats, dash-mounted clock, radio, and even the sun visors in an effort to reduce the car's weight as much as possible. The sound insulation was also reduced, which must make listening to the flat-six even more pleasurable.

Although almost completely original, the single owner did make a few changes through the years. The black exterior mirror replaced the chrome item, for instance, and the two rubber straps for the rear engine lid were replaced by the "M472" lock. Making this classic 911 even more desirable is the matching-numbers chassis, engine, and transmission. Included in the sale are the original German service book and dealer invoice. The price? Well, most of us would need to sell our souls. This RS 2.7 Lightweight is expected to go for between €800,000 and €1,000,000. That works out to between $847,000 and $1,059,000 at current rates, far more than you'll pay for any other brand new Porsche.