Displayed in the not-traditionally-supercar-heavy surroundings of Cheltenham, the CCXR was being advertised by Broughtons for £1.5 million.

And it’s a hell of a car. With a 4.8-litre twin-supercharged engine, the CCXR is tuned to run on biofuel and develops 1,018bhp. Koenigsegg says the CCXR is good for 0-62mph in 2.9 seconds and a top speed of 254mph.

The CCXR, which appeared on Auto Trader in October last year, held its place at the top of the price rankings for 12 months with only one car before the FXX running it close.

And what a car it was. In August we had a McLaren F1 GTR for sale – for £1.4 million. Initially a race car driven by F1 legend Nelson Piquet, the 1996 GTR was converted to road use.

Gallery: McLaren F1

With a 6.1-litre V12 engine supplied by BMW, the 1996 McLaren F1 GTR develops 600bhp and 388lb/ft of pulling power.

This power means the 1,012kg hypercar will accelerate from 0-62mph in around 3 seconds before hitting a top speed of 220mph. And you get a central driving position which is one of the coolest features on any supercar.

The Ferrari FXX, Koenigsegg CCXR and McLaren F1 GTR are the stand-out motors in terms of the high-end of high prices.

But they aren’t the only models to cost more than £1 million.

The Ferrari Enzo – which the FXX is based on – is proving to be the best modern-day supercar for maintaining its value. Costing £420,000 when it was launched in 2002, prices for the Enzo continue to rise with one model on sale for £1.2 million.

Gallery: Ferrari Enzo

With a 6-litre V12 engine, the 660bhp Enzo will accelerate from 0-62mph in 3.65 seconds and reach 218mph. Just 399 were ever built and we anticipate the price will continue to rise as more and more are written off.

And then we get to the Bugatti Veyron. Arguably the most complete supercar ever built, the Veyron is an engineering masterpiece.

Gallery: £1 million-plus Veyrons on Auto Trader

With an 8-litre W16 engine, the Veyron will accelerate from 0-62mph in 2.5 seconds and reach a top speed of 253mph. When it went on sale in 2006, the Veyron had a price-tag of £830,000.

Since then, Auto Trader has had around ten for sale including Jenson Button’s. We currently have two unregistered models for sale – a red and black 2009 model for £1.1 million advertised by Nash Konig and a white 2008 model offered by V12 Design for £1 million.

The final car to squeeze itself into the Auto Trader £1 million club is a Lamborghini Reventon – the most outrageous supercar of all time.

Gallery: Lamborghini Reventon

Inspired by a fighter jet, the Reventon isn’t as fast as its aviation mate but it doesn’t half stand out.

With a tungsten grey paintjob, in-yer-face looks and 6.5-litre V12 engine, the Reventon will accelerate from 0-62mph in 3.4 seconds before hitting a top speed of 211mph. When it was launched at the 2007 Frankfurt Motor Show, the Reventon had an £800,000 price-tag.

With a production run of just 20 – the Reventon is the rarest of Auto Trader’s £1 million club.

Two years later, you’ll pay £1 million – if it sells at this price it would have earned £100,000-a-year which is four times the average annual salary in the UK.

Keep an eye out on Auto Trader for more super-expensive cars. We have a selection of Ferraris, Bugatti and Paganis ranging between £500,000 and £1,000,000.

And coming up soon are some more Koenigseggs, a Mercedes McLaren SLR Stirling Moss and possibly a Lamborghini Reventon Roadster.