A little over 2,000 GT500's were sold in its first year, about double the number of GT350's sold in that year.
The 1968 Shelby GT500 would once again feature a 428 cubic inch engine; the Police Interceptor model from Ford. For those looking for more power, the GT500KR was introduced in February, 1968. The KR stands for "King of the Road," and this car certainly was. It had the 428 Cobra Jet V8 engine making 360 horsepower. 1968 was also the first year the GT500 was sold as a convertible. Those cars are of particular interest to collectors today.
Like the Ford Mustang from the same years, the GT500 went through a major redesign for the 1969 and 1970 model years. The 1970 Shelby GT500 models are actually the leftover stock from 1969. The VIN tags were removed and replaced with new 1970 VIN tags, under the very close supervision of the FBI, of course.
The Shelby GT500 made a comeback in 2007, and has been one of the most popular of the newly-modified Mustang, although these cars are more factory stock than the originals. Buyers are paying tens of thousands of dollars in premiums just for the right to purchase these cars.
The Shelby GT500 is a favorite in the collector car world. There may be some cars that are rarer, but few are more iconic. This car has been featured in a number of films, including what some might call a starring role in the remake of Gone in 60 Seconds.
There are still a few places where you can find Shelby GT500's for sale on a regular basis. The first place I look is on eBay. I've seen a Shelby GT500KR on there, and even a Shelby GT500 Super Snake. You can also find these cars listed in the Hemmings catalog.