The most hassle free way to sell your car is to sell it back to the dealer or sell it to Carmax. You probably won't get as much as a private party sale though.
Like Randy said, post an ad in the for sale section of this forum. Make sure to put a lot of pictures and a detailed description will help as well.
You can fiddle with the likes of autotrader.com and cars.com, but I personally haven't had any luck selling cars on those websites. I've had the best luck with craigslist and posting in the for sale sections of automobile specific forums such as this one.
A business associate who knew I was a "Lotus guy" sent me a disk of dozens of pics of this vehicle. It is spectacular. Beautiful paint scheme (flat black racing stripes w/ yellow pinstripes over red), looks very very clean.