The Ocala Breeders' Sales Company's 2-year-old sales attract all the heavyweights in the business, people who are ready to spend millions and have proven records of picking out future stars. Then there is Mark Schwartz. Schwartz arrived at this year's OBS Spring sale with a modest budget and ready to buy a horse at a sale for the first time. A Brooklyn-born retiree living in Florida, he knew the odds were not in his favor. "I did my research, but this was kind of like playing the lottery," he said....