By this stage, they've probably had enough of being asked about that $1 mare. But the remarkable thing is that the first Thoroughbred ever acquired by Robert and Stacy Mitchell still cost more (cover fees aside) than all the others that have stocked Briland Farm, on and off the racetrack, since 2001. That was the year, having begun an inadvertent breeding career with a mare discarded by a friend of a friend, they decided to see what they could do with one that cost as much as $36,000. Her name...