It's estimated to sell for $200,000.

Prices of late-model, air-cooled Porsche 911s reached crazy new heights a few weeks ago at RM Sothebys’ London sale, where a 1995 911 GT2 sold for an unbelievable £1.8 million ($2.5 million). It will be interesting to see if the trend continues at Silverstone Auctions’ dedicated Porsche sale, where one of the highlights will be this ultra-rare 1991 911 Carrera RS NGT.

Porsche introduced the tuned, honed 964-generation Carrera RS in 1991. Judicious tuning of the 3.8-liter, flat-six engine increased output to 260 horsepower (194 kilowatts), close-ratio gears and a limited slip differential were added, the suspension was lowered and stiffened, and the power steering was thrown away. With a heavily stripped interior weight dropped a whopping 345 pounds (155 kilograms), too.

It was, in other words, made for the track. But it wasn’t actually race-ready. The NGT was, though, with a bare-metal interior and FIA-spec, welded-in rollcage. This was a car that could be driven straight from the dealer to grid of the Nurburgring 24 Hours. Quite literally, as it was completely road legal, helpfully.

It seems like this Maritime Blue example, number 76 of 290, has never raced, but it would be amazing it if hasn’t seen a lot of on-track action. It was first registered in December 1991 to a German owner. It went through two more owners in Germany before being exported to Japan in 2010, then going to the UK.

According to the auction house, it’s in excellent condition and has a comprehensive service history - including the original handbook, maintenance book, and options sticker - to back up the 25,000 miles (40,000 kilometers) shown on the clock.

Silverstone Auctions managing director, Nick Whale, said: “This is a superb example indeed and would make a fine addition to any Porsche collection. The 964 is often regarded as the all-encompassing true drivers’ 911, and there can be no doubt that this Carrera RS in NGT specification is one of the most driver-focused and rewarding Porsches you will ever find.”

Carrera RS values have flown in the last few years, so this one’s estimate of £135,000 to £155,000 ($176,000 to $200,000) actually looks pretty reasonable, especially after what happened at RM Sothebys. We’ll have to wait and see if it has any lasting effect.

Silverstone Auctions’ Porsche Sale takes place on October 15.

Gallery: 1991 Porsche 911 Carrera RS NGT