Cheap way to get fit using Pilates ball

Cant stop my self searching a great way to stay fit because im kinda sadist in regards on exercising method and same stuff because i believin on the saying no pain no gain , so i have to work hard and feel the body pain that i got through out exercising..LOL anyways i just wanna share with you guys this new method that i found on youtube, actually my father telling me this , he said hey why you should try the pilates ball exercise and i said what? because i dont have any idea on this , so i go to youtube and watch some routine and i think this might work for me as well, and now all i have to do is to buy that ball then ill follow whats on this video..haha and ill let you know if how much that ball cost with if i bought mine..