The engine options on the new Stang range from a 210 horsepower V6 on the base model to a 300 horsepower V8 on the GT model. The special edition GT500 has a supercharged V8 making 500 horsepower. I believe there is also an option for a 4 cylinder engine as part of a program by Ford to supply safer cars for younger drivers.
There are more special editions of the new Mustang than I can list here. Some of them include the Shelby GT500 and Shelby GT-H, the FR500C, and the GT/CS California Special. These cars have been a hit with consumers, and the aftermarket is really starting to flood the market with custom parts for these cars.
If you are looking to buy one of these, you have a few options. You can buy one new off the dealer lot. The base model sells for under $20,000, with sportier special edition models going for over $50,000. You can save a few thousand by buying one used from a dealer. You will still be paying a significant markup over a private seller. For the best deals, try looking on eBay, where you can also find an abundance of aftermarket parts.