Well the list depends on the type of pocket and actual definition of the word: cheapest.
Audi A6, Audi S8, VW Golf, Chevrolet Camaro, Ford Mustang, Mitsubishi Eclipse, Mitsubishi Lancer EVO 6 is few good racer cars.
Sticking with japanese will be cheaper than German and American brands.
For newbie start slow and get hang of driving, and maintenance and then slowly upgrade the ride every 6-12 months until you are satified with league and definition of cheapest.